From Newsgroup: rec.bicycles.tech

I bought one of these since they are dirt cheap bto investigate. When I got it the manual didn't say it was set up for schrader valves so since the parts are all blackit took me a half hour to figure out that I had to remove the rubber plug and the replace it with the Preta valve fitting. Then the pump would not turn on though the charge was full.
Finally I stuck a screwdriver in the air exit and this moved the pumping mechanism slightly and it operated fine after that.
With Silca tubeless sealant and tubeless tires you'd probably only have to carry this pump on the bike. I'll let you know how that works out. The Silca sealant is supposed to close 6 mm holes and I never had a tubeless puncture larger than that.
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I got it the manual didn't say it was set up for schrader valves so since the parts are all blackit took me a half hour to figure out that I had to remove the rubber plug and the replace it with the Preta valve fitting. Then the pump would not turn on though the charge was full.

Finally I stuck a screwdriver in the air exit and this moved the pumping mechanism slightly and it operated fine after that.

With Silca tubeless sealant and tubeless tires you'd probably only have to carry this pump on the bike. I'll let you know how that works out. The Silca sealant is supposed to close 6 mm holes and I never had a tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable.
--
Andrew Muzi
am@yellowjersey.org
Open every day since 1 April, 1971
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I
got it the manual didn't say it was set up for schrader valves so since
the parts are all blackit took me a half hour to figure out that I had
to remove the rubber plug and the replace it with the Preta valve
fitting. Then the pump would not turn on though the charge was full.

Finally I stuck a screwdriver in the air exit and this moved the pumping
mechanism slightly and it operated fine after that.

With Silca tubeless sealant and tubeless tires you'd probably only have
to carry this pump on the bike. I'll let you know how that works out.
The Silca sealant is supposed to close 6 mm holes and I never had a
tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable.

No somewhat optimistically Silca and others do claim 6mm.

<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower
pressures, though IrCOve found it (tubeless) is fairly reliable with thorn holes, less so for slashes be that flint or glass.

Hence my roadie commuter has tubes and tyres with protection so I donrCOt
need to worry about glass.

Roger Merriman

--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On Mon, 25 Aug 2025 18:40:58 GMT, cyclintom <cyclintom@yahoo.com>
wrote:

I bought one of these since they are dirt cheap bto investigate. When I got it the manual didn't say it was set up for schrader valves so since the parts are all blackit took me a half hour to figure out that I had to remove the rubber plug and the replace it with the Preta valve fitting. Then the pump would not turn on though the charge was full.

Finally I stuck a screwdriver in the air exit and this moved the pumping mechanism slightly and it operated fine after that.

With Silca tubeless sealant and tubeless tires you'd probably only have to carry this pump on the bike. I'll let you know how that works out. The Silca sealant is supposed to close 6 mm holes and I never had a tubeless puncture larger than that.

I use a number of battery powered devices for my bike rides. Failure
of none of them will cause me severe problems, and I'll keep it that
way. I carry a Topeak Morph-G pump.

--
C'est bon
Soloman
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I
got it the manual didn't say it was set up for schrader valves so since
the parts are all blackit took me a half hour to figure out that I had
to remove the rubber plug and the replace it with the Preta valve
fitting. Then the pump would not turn on though the charge was full.

Finally I stuck a screwdriver in the air exit and this moved the pumping >>> mechanism slightly and it operated fine after that.

With Silca tubeless sealant and tubeless tires you'd probably only have
to carry this pump on the bike. I'll let you know how that works out.
The Silca sealant is supposed to close 6 mm holes and I never had a
tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable.

No somewhat optimistically Silca and others do claim 6mm.

<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower pressures, though IrCOve found it (tubeless) is fairly reliable with thorn holes, less so for slashes be that flint or glass.

Hence my roadie commuter has tubes and tyres with protection so I donrCOt need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things: https://www.yellowjersey.org/photosfromthepast/cciround.jpg
is necessarily big enough to have rent the fabric severely.
--
Andrew Muzi
am@yellowjersey.org
Open every day since 1 April, 1971
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I >>> got it the manual didn't say it was set up for schrader valves so since >>> the parts are all blackit took me a half hour to figure out that I had >>> to remove the rubber plug and the replace it with the Preta valve
fitting. Then the pump would not turn on though the charge was full.

Finally I stuck a screwdriver in the air exit and this moved the pumping >>> mechanism slightly and it operated fine after that.

With Silca tubeless sealant and tubeless tires you'd probably only have >>> to carry this pump on the bike. I'll let you know how that works out.
The Silca sealant is supposed to close 6 mm holes and I never had a
tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable.

No somewhat optimistically Silca and others do claim 6mm.

<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower pressures, though I?ve found it (tubeless) is fairly reliable with thorn holes, less so for slashes be that flint or glass.

Hence my roadie commuter has tubes and tyres with protection so I don?t need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things: https://www.yellowjersey.org/photosfromthepast/cciround.jpg
is necessarily big enough to have rent the fabric severely.

I'm among the skeptical as well. But I hesitate calling Silca liars so I will try it and see.
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I >>>>> got it the manual didn't say it was set up for schrader valves so since >>>>> the parts are all blackit took me a half hour to figure out that I had >>>>> to remove the rubber plug and the replace it with the Preta valve
fitting. Then the pump would not turn on though the charge was full. >>>>>
Finally I stuck a screwdriver in the air exit and this moved the pumping >>>>> mechanism slightly and it operated fine after that.

With Silca tubeless sealant and tubeless tires you'd probably only have >>>>> to carry this pump on the bike. I'll let you know how that works out. >>>>> The Silca sealant is supposed to close 6 mm holes and I never had a
tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable.

No somewhat optimistically Silca and others do claim 6mm.

<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower
pressures, though I?ve found it (tubeless) is fairly reliable with thorn >>> holes, less so for slashes be that flint or glass.

Hence my roadie commuter has tubes and tyres with protection so I don?t
need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things:
https://www.yellowjersey.org/photosfromthepast/cciround.jpg
is necessarily big enough to have rent the fabric severely.

I'm among the skeptical as well. But I hesitate calling Silca liars so I will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and
report back.
--
Andrew Muzi
am@yellowjersey.org
Open every day since 1 April, 1971
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On Mon, 25 Aug 2025 17:58:44 -0500, AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I >>>>>> got it the manual didn't say it was set up for schrader valves so since >>>>>> the parts are all blackit took me a half hour to figure out that I had >>>>>> to remove the rubber plug and the replace it with the Preta valve
fitting. Then the pump would not turn on though the charge was full. >>>>>>
Finally I stuck a screwdriver in the air exit and this moved the pumping >>>>>> mechanism slightly and it operated fine after that.

With Silca tubeless sealant and tubeless tires you'd probably only have >>>>>> to carry this pump on the bike. I'll let you know how that works out. >>>>>> The Silca sealant is supposed to close 6 mm holes and I never had a >>>>>> tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable.

No somewhat optimistically Silca and others do claim 6mm.

<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower
pressures, though I?ve found it (tubeless) is fairly reliable with thorn >>>> holes, less so for slashes be that flint or glass.

Hence my roadie commuter has tubes and tyres with protection so I don?t >>>> need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things:
https://www.yellowjersey.org/photosfromthepast/cciround.jpg
is necessarily big enough to have rent the fabric severely.

I'm among the skeptical as well. But I hesitate calling Silca liars so I will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and
report back.

This might be useful information for someone living in Tom's
neighborhood.

"how many TIRES does it take to stop a bullet?" <https://www.youtube.com/watch?v=rX-3SRqdjWw>
He starts off with a .22LR.

When I was younger and dumber, we were shooting at big heavy tractor
tires with .22LR from about 25ft. We were warned that the bullet
might bounce back in our direction. After about 50 rounds, one bullet
broke a window about 50 ft behind us. Oops. After that, the
consensus was that shooting at hard rubber targets was a really bad
idea.
--
Jeff Liebermann jeffl@cruzio.com
PO Box 272 http://www.LearnByDestroying.com
Ben Lomond CA 95005-0272
Skype: JeffLiebermann AE6KS 831-336-2558
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I >>>>>> got it the manual didn't say it was set up for schrader valves so since >>>>>> the parts are all blackit took me a half hour to figure out that I had >>>>>> to remove the rubber plug and the replace it with the Preta valve
fitting. Then the pump would not turn on though the charge was full. >>>>>>
Finally I stuck a screwdriver in the air exit and this moved the pumping >>>>>> mechanism slightly and it operated fine after that.

With Silca tubeless sealant and tubeless tires you'd probably only have >>>>>> to carry this pump on the bike. I'll let you know how that works out. >>>>>> The Silca sealant is supposed to close 6 mm holes and I never had a >>>>>> tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable.

No somewhat optimistically Silca and others do claim 6mm.

<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower
pressures, though I?ve found it (tubeless) is fairly reliable with thorn >>>> holes, less so for slashes be that flint or glass.

Hence my roadie commuter has tubes and tyres with protection so I don?t >>>> need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things:
https://www.yellowjersey.org/photosfromthepast/cciround.jpg
is necessarily big enough to have rent the fabric severely.

I'm among the skeptical as well. But I hesitate calling Silca liars so I
will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and
report back.

A slash is more likely to be sealed, than a circular hole which is likely
to have a 100% failure!

IrCOve certainly had thorn and small flint slashes seal, the offending object is always gone. So a few MM though some way off 6/7mm which is the upper
limit, and has tyre pressure increases itrCOs even less likely, hence this works better with MTB tyres.

Roger Merriman

--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On 8/26/2025 12:00 AM, Jeff Liebermann wrote:

On Mon, 25 Aug 2025 17:58:44 -0500, AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I >>>>>>> got it the manual didn't say it was set up for schrader valves so since >>>>>>> the parts are all blackit took me a half hour to figure out that I had >>>>>>> to remove the rubber plug and the replace it with the Preta valve >>>>>>> fitting. Then the pump would not turn on though the charge was full. >>>>>>>
Finally I stuck a screwdriver in the air exit and this moved the pumping
mechanism slightly and it operated fine after that.

With Silca tubeless sealant and tubeless tires you'd probably only have >>>>>>> to carry this pump on the bike. I'll let you know how that works out. >>>>>>> The Silca sealant is supposed to close 6 mm holes and I never had a >>>>>>> tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable.

No somewhat optimistically Silca and others do claim 6mm.

<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower
pressures, though I?ve found it (tubeless) is fairly reliable with thorn >>>>> holes, less so for slashes be that flint or glass.

Hence my roadie commuter has tubes and tyres with protection so I don?t >>>>> need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things:
https://www.yellowjersey.org/photosfromthepast/cciround.jpg
is necessarily big enough to have rent the fabric severely.

I'm among the skeptical as well. But I hesitate calling Silca liars so I will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and
report back.

This might be useful information for someone living in Tom's
neighborhood.

"how many TIRES does it take to stop a bullet?" <https://www.youtube.com/watch?v=rX-3SRqdjWw>
He starts off with a .22LR.

When I was younger and dumber, we were shooting at big heavy tractor
tires with .22LR from about 25ft. We were warned that the bullet
might bounce back in our direction. After about 50 rounds, one bullet
broke a window about 50 ft behind us. Oops. After that, the
consensus was that shooting at hard rubber targets was a really bad
idea.

Yes that's right especially for thick truck tires. Bicycle
tires are a different thing, more like a cardboard target. I
measured the openings in a cardboard box target from 50
feet. They are about 6mm. (point blank would just shred a tire)

My suggestion was admittedly tongue in cheek as piercing a
tire without rim damage is not very likely. Still and all, a
6mm hole in a bicycle tire is a major catastrophic injury.
Moreso for thin fabric high pressure road tires, less so for
low pressure 26x5 and the like.
--
Andrew Muzi
am@yellowjersey.org
Open every day since 1 April, 1971
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On 8/26/2025 6:21 AM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I >>>>>>> got it the manual didn't say it was set up for schrader valves so since >>>>>>> the parts are all blackit took me a half hour to figure out that I had >>>>>>> to remove the rubber plug and the replace it with the Preta valve >>>>>>> fitting. Then the pump would not turn on though the charge was full. >>>>>>>
Finally I stuck a screwdriver in the air exit and this moved the pumping
mechanism slightly and it operated fine after that.

With Silca tubeless sealant and tubeless tires you'd probably only have >>>>>>> to carry this pump on the bike. I'll let you know how that works out. >>>>>>> The Silca sealant is supposed to close 6 mm holes and I never had a >>>>>>> tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable.

No somewhat optimistically Silca and others do claim 6mm.

<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower
pressures, though I?ve found it (tubeless) is fairly reliable with thorn >>>>> holes, less so for slashes be that flint or glass.

Hence my roadie commuter has tubes and tyres with protection so I don?t >>>>> need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things:
https://www.yellowjersey.org/photosfromthepast/cciround.jpg
is necessarily big enough to have rent the fabric severely.

I'm among the skeptical as well. But I hesitate calling Silca liars so I >>> will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and
report back.

A slash is more likely to be sealed, than a circular hole which is likely
to have a 100% failure!

IrCOve certainly had thorn and small flint slashes seal, the offending object is always gone. So a few MM though some way off 6/7mm which is the upper limit, and has tyre pressure increases itrCOs even less likely, hence this works better with MTB tyres.

Roger Merriman

Yes I agree. Generally, where there is no visible fabric
damage (thorn, glass shard, wire), the tire will give good
service after a puncture repair. Where fabric integrity is
lost, the tire will continue to degrade, first as a lump and
then on to total failure. That will be faster for thin high
pressure casings and slower for thick fat low pressure tires.
--
Andrew Muzi
am@yellowjersey.org
Open every day since 1 April, 1971
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On 26 Aug 2025 11:21:05 GMT, Roger Merriman <roger@sarlet.com> wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I >>>>>>> got it the manual didn't say it was set up for schrader valves so since >>>>>>> the parts are all blackit took me a half hour to figure out that I had >>>>>>> to remove the rubber plug and the replace it with the Preta valve >>>>>>> fitting. Then the pump would not turn on though the charge was full. >>>>>>>
Finally I stuck a screwdriver in the air exit and this moved the pumping
mechanism slightly and it operated fine after that.

With Silca tubeless sealant and tubeless tires you'd probably only have >>>>>>> to carry this pump on the bike. I'll let you know how that works out. >>>>>>> The Silca sealant is supposed to close 6 mm holes and I never had a >>>>>>> tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable.

No somewhat optimistically Silca and others do claim 6mm.

<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower
pressures, though I?ve found it (tubeless) is fairly reliable with thorn >>>>> holes, less so for slashes be that flint or glass.

Hence my roadie commuter has tubes and tyres with protection so I don?t >>>>> need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things:
https://www.yellowjersey.org/photosfromthepast/cciround.jpg
is necessarily big enough to have rent the fabric severely.

I'm among the skeptical as well. But I hesitate calling Silca liars so I >>> will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and
report back.

A slash is more likely to be sealed, than a circular hole which is likely
to have a 100% failure!

IAve certainly had thorn and small flint slashes seal, the offending object >is always gone. So a few MM though some way off 6/7mm which is the upper >limit, and has tyre pressure increases itAs even less likely, hence this >works better with MTB tyres.

Roger Merriman

I'll pass. I understand the slime sealants make a mess on the inside
of your tires.

--
C'est bon
Soloman
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

Catrike Ryder <Soloman@old.bikers.org> wrote:

On 26 Aug 2025 11:21:05 GMT, Roger Merriman <roger@sarlet.com> wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I
got it the manual didn't say it was set up for schrader valves so since
the parts are all blackit took me a half hour to figure out that I had >>>>>>>> to remove the rubber plug and the replace it with the Preta valve >>>>>>>> fitting. Then the pump would not turn on though the charge was full. >>>>>>>>
Finally I stuck a screwdriver in the air exit and this moved the pumping
mechanism slightly and it operated fine after that.

With Silca tubeless sealant and tubeless tires you'd probably only have
to carry this pump on the bike. I'll let you know how that works out. >>>>>>>> The Silca sealant is supposed to close 6 mm holes and I never had a >>>>>>>> tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable.

No somewhat optimistically Silca and others do claim 6mm.

<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower >>>>>> pressures, though I?ve found it (tubeless) is fairly reliable with thorn >>>>>> holes, less so for slashes be that flint or glass.

Hence my roadie commuter has tubes and tyres with protection so I don?t >>>>>> need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things:
https://www.yellowjersey.org/photosfromthepast/cciround.jpg
is necessarily big enough to have rent the fabric severely.

I'm among the skeptical as well. But I hesitate calling Silca liars so I >>>> will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and
report back.

A slash is more likely to be sealed, than a circular hole which is likely
to have a 100% failure!

I-Ave certainly had thorn and small flint slashes seal, the offending object >> is always gone. So a few MM though some way off 6/7mm which is the upper
limit, and has tyre pressure increases it-As even less likely, hence this
works better with MTB tyres.

Roger Merriman

I'll pass. I understand the slime sealants make a mess on the inside
of your tires.

The sealant will need to be topped up and in general tubeless needs more maintenance, so need to make the judgment call as to whether itrCOs worth
that.

Out of the 4 bikes I own only the Gravel bike hits that level for me!

Considering your usage and that the tyres available to the CatTrike are on
the more durable than racy side, canrCOt imagine tubeless being a thing, let alone getting compatible wheels, certainly for the front 20in wheels, might
be possible for the rear, ie models with a 700c rear wheel.

--
C'est bon
Soloman

Roger Merriman



--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On 8/26/2025 8:03 AM, Catrike Ryder wrote:

On 26 Aug 2025 11:21:05 GMT, Roger Merriman <roger@sarlet.com> wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I
got it the manual didn't say it was set up for schrader valves so since
the parts are all blackit took me a half hour to figure out that I had >>>>>>>> to remove the rubber plug and the replace it with the Preta valve >>>>>>>> fitting. Then the pump would not turn on though the charge was full. >>>>>>>>
Finally I stuck a screwdriver in the air exit and this moved the pumping
mechanism slightly and it operated fine after that.

With Silca tubeless sealant and tubeless tires you'd probably only have
to carry this pump on the bike. I'll let you know how that works out. >>>>>>>> The Silca sealant is supposed to close 6 mm holes and I never had a >>>>>>>> tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable.

No somewhat optimistically Silca and others do claim 6mm.

<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower >>>>>> pressures, though I?ve found it (tubeless) is fairly reliable with thorn >>>>>> holes, less so for slashes be that flint or glass.

Hence my roadie commuter has tubes and tyres with protection so I don?t >>>>>> need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things:
https://www.yellowjersey.org/photosfromthepast/cciround.jpg
is necessarily big enough to have rent the fabric severely.

I'm among the skeptical as well. But I hesitate calling Silca liars so I >>>> will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and
report back.

A slash is more likely to be sealed, than a circular hole which is likely
to have a 100% failure!

IrCOve certainly had thorn and small flint slashes seal, the offending object
is always gone. So a few MM though some way off 6/7mm which is the upper
limit, and has tyre pressure increases itrCOs even less likely, hence this >> works better with MTB tyres.

Roger Merriman

I'll pass. I understand the slime sealants make a mess on the inside
of your tires.

--
C'est bon
Soloman

under a minute:

https://www.youtube.com/watch?v=2MEXNj-4hVg

https://www.youtube.com/watch?v=N3BPzTXYlKI

This is about 22 minutes but thorough and informative: https://www.youtube.com/watch?v=lEHwQ2yr84w
--
Andrew Muzi
am@yellowjersey.org
Open every day since 1 April, 1971
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On 26 Aug 2025 13:43:29 GMT, Roger Merriman <roger@sarlet.com> wrote:

Catrike Ryder <Soloman@old.bikers.org> wrote:

On 26 Aug 2025 11:21:05 GMT, Roger Merriman <roger@sarlet.com> wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I
got it the manual didn't say it was set up for schrader valves so since
the parts are all blackit took me a half hour to figure out that I had
to remove the rubber plug and the replace it with the Preta valve >>>>>>>>> fitting. Then the pump would not turn on though the charge was full. >>>>>>>>>
Finally I stuck a screwdriver in the air exit and this moved the pumping
mechanism slightly and it operated fine after that.

With Silca tubeless sealant and tubeless tires you'd probably only have
to carry this pump on the bike. I'll let you know how that works out. >>>>>>>>> The Silca sealant is supposed to close 6 mm holes and I never had a >>>>>>>>> tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable.

No somewhat optimistically Silca and others do claim 6mm.

<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower >>>>>>> pressures, though I?ve found it (tubeless) is fairly reliable with thorn
holes, less so for slashes be that flint or glass.

Hence my roadie commuter has tubes and tyres with protection so I don?t >>>>>>> need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things:
https://www.yellowjersey.org/photosfromthepast/cciround.jpg
is necessarily big enough to have rent the fabric severely.

I'm among the skeptical as well. But I hesitate calling Silca liars so I >>>>> will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and
report back.

A slash is more likely to be sealed, than a circular hole which is likely >>> to have a 100% failure!

I?ve certainly had thorn and small flint slashes seal, the offending object >>> is always gone. So a few MM though some way off 6/7mm which is the upper >>> limit, and has tyre pressure increases it?s even less likely, hence this >>> works better with MTB tyres.

Roger Merriman

I'll pass. I understand the slime sealants make a mess on the inside
of your tires.

The sealant will need to be topped up and in general tubeless needs more >maintenance, so need to make the judgment call as to whether itAs worth
that.

Out of the 4 bikes I own only the Gravel bike hits that level for me!

Considering your usage and that the tyres available to the CatTrike are on >the more durable than racy side, canAt imagine tubeless being a thing, let >alone getting compatible wheels, certainly for the front 20in wheels, might >be possible for the rear, ie models with a 700c rear wheel.

--
C'est bon
Soloman

Roger Merriman

I was talking about not using slime goop with tube tires. There are
even tubes available with goop already in them.

FWIW, there are "racy" tires available for 26 and 20 inch tires.
Schwalbe also makes a 20 inch tubeless tire.

--
C'est bon
Soloman
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

Catrike Ryder <Soloman@old.bikers.org> wrote:

On 26 Aug 2025 13:43:29 GMT, Roger Merriman <roger@sarlet.com> wrote:

Catrike Ryder <Soloman@old.bikers.org> wrote:

On 26 Aug 2025 11:21:05 GMT, Roger Merriman <roger@sarlet.com> wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I
got it the manual didn't say it was set up for schrader valves so since
the parts are all blackit took me a half hour to figure out that I had
to remove the rubber plug and the replace it with the Preta valve >>>>>>>>>> fitting. Then the pump would not turn on though the charge was full. >>>>>>>>>>
Finally I stuck a screwdriver in the air exit and this moved the pumping
mechanism slightly and it operated fine after that.

With Silca tubeless sealant and tubeless tires you'd probably only have
to carry this pump on the bike. I'll let you know how that works out.
The Silca sealant is supposed to close 6 mm holes and I never had a >>>>>>>>>> tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable.

No somewhat optimistically Silca and others do claim 6mm.

<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower >>>>>>>> pressures, though I?ve found it (tubeless) is fairly reliable with thorn
holes, less so for slashes be that flint or glass.

Hence my roadie commuter has tubes and tyres with protection so I don?t
need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things:
https://www.yellowjersey.org/photosfromthepast/cciround.jpg
is necessarily big enough to have rent the fabric severely.

I'm among the skeptical as well. But I hesitate calling Silca liars so I >>>>>> will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and
report back.

A slash is more likely to be sealed, than a circular hole which is likely >>>> to have a 100% failure!

I?ve certainly had thorn and small flint slashes seal, the offending object
is always gone. So a few MM though some way off 6/7mm which is the upper >>>> limit, and has tyre pressure increases it?s even less likely, hence this >>>> works better with MTB tyres.

Roger Merriman

I'll pass. I understand the slime sealants make a mess on the inside
of your tires.

The sealant will need to be topped up and in general tubeless needs more
maintenance, so need to make the judgment call as to whether it-As worth
that.

Out of the 4 bikes I own only the Gravel bike hits that level for me!

Considering your usage and that the tyres available to the CatTrike are on >> the more durable than racy side, can-At imagine tubeless being a thing, let >> alone getting compatible wheels, certainly for the front 20in wheels, might >> be possible for the rear, ie models with a 700c rear wheel.

--
C'est bon
Soloman

Roger Merriman

I was talking about not using slime goop with tube tires. There are
even tubes available with goop already in them.

Yup they have been around a few decades now, fairly ineffective in
comparison to tubeless.

FWIW, there are "racy" tires available for 26 and 20 inch tires.
Schwalbe also makes a 20 inch tubeless tire.

For 26inch yes, they do a Pro one and TT ie full on road race tubless,
20inch itrCOs tube only for the road tyre ie the one and various Marathon models.

Which makes sense as 26inch there will be tubeless rims being still made,
as MTB was way ahead of road as ever.

20inch is generally more utilitarian bikes and kids bikes so IrCOd be very surprised if a tubeless rim in that size was ever made.

--
C'est bon
Soloman

Roger Merriman


--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On Tue, 26 Aug 2025 08:47:10 -0500, AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 8:03 AM, Catrike Ryder wrote:

On 26 Aug 2025 11:21:05 GMT, Roger Merriman <roger@sarlet.com> wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I
got it the manual didn't say it was set up for schrader valves so since
the parts are all blackit took me a half hour to figure out that I had
to remove the rubber plug and the replace it with the Preta valve >>>>>>>>> fitting. Then the pump would not turn on though the charge was full. >>>>>>>>>
Finally I stuck a screwdriver in the air exit and this moved the pumping
mechanism slightly and it operated fine after that.

With Silca tubeless sealant and tubeless tires you'd probably only have
to carry this pump on the bike. I'll let you know how that works out. >>>>>>>>> The Silca sealant is supposed to close 6 mm holes and I never had a >>>>>>>>> tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable.

No somewhat optimistically Silca and others do claim 6mm.

<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower >>>>>>> pressures, though I?ve found it (tubeless) is fairly reliable with thorn
holes, less so for slashes be that flint or glass.

Hence my roadie commuter has tubes and tyres with protection so I don?t >>>>>>> need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things:
https://www.yellowjersey.org/photosfromthepast/cciround.jpg
is necessarily big enough to have rent the fabric severely.

I'm among the skeptical as well. But I hesitate calling Silca liars so I >>>>> will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and
report back.

A slash is more likely to be sealed, than a circular hole which is likely >>> to have a 100% failure!

IAve certainly had thorn and small flint slashes seal, the offending object >>> is always gone. So a few MM though some way off 6/7mm which is the upper >>> limit, and has tyre pressure increases itAs even less likely, hence this >>> works better with MTB tyres.

Roger Merriman

I'll pass. I understand the slime sealants make a mess on the inside
of your tires.

--
C'est bon
Soloman

under a minute:

https://www.youtube.com/watch?v=2MEXNj-4hVg

https://www.youtube.com/watch?v=N3BPzTXYlKI

This is about 22 minutes but thorough and informative: >https://www.youtube.com/watch?v=lEHwQ2yr84w

I read about a guy eventually trashing a wheel after getting a serious
flat with one of the preslimed tubes. I'm not going to go that route.

--
C'est bon
Soloman
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On 26 Aug 2025 14:36:25 GMT, Roger Merriman <roger@sarlet.com> wrote:

Catrike Ryder <Soloman@old.bikers.org> wrote:

On 26 Aug 2025 13:43:29 GMT, Roger Merriman <roger@sarlet.com> wrote:

Catrike Ryder <Soloman@old.bikers.org> wrote:

On 26 Aug 2025 11:21:05 GMT, Roger Merriman <roger@sarlet.com> wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I
got it the manual didn't say it was set up for schrader valves so since
the parts are all blackit took me a half hour to figure out that I had
to remove the rubber plug and the replace it with the Preta valve >>>>>>>>>>> fitting. Then the pump would not turn on though the charge was full.

Finally I stuck a screwdriver in the air exit and this moved the pumping
mechanism slightly and it operated fine after that.

With Silca tubeless sealant and tubeless tires you'd probably only have
to carry this pump on the bike. I'll let you know how that works out.
The Silca sealant is supposed to close 6 mm holes and I never had a >>>>>>>>>>> tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable.

No somewhat optimistically Silca and others do claim 6mm.

<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower >>>>>>>>> pressures, though I?ve found it (tubeless) is fairly reliable with thorn
holes, less so for slashes be that flint or glass.

Hence my roadie commuter has tubes and tyres with protection so I don?t
need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things:
https://www.yellowjersey.org/photosfromthepast/cciround.jpg
is necessarily big enough to have rent the fabric severely.

I'm among the skeptical as well. But I hesitate calling Silca liars so I
will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and
report back.

A slash is more likely to be sealed, than a circular hole which is likely >>>>> to have a 100% failure!

I?ve certainly had thorn and small flint slashes seal, the offending object
is always gone. So a few MM though some way off 6/7mm which is the upper >>>>> limit, and has tyre pressure increases it?s even less likely, hence this >>>>> works better with MTB tyres.

Roger Merriman

I'll pass. I understand the slime sealants make a mess on the inside
of your tires.

The sealant will need to be topped up and in general tubeless needs more >>> maintenance, so need to make the judgment call as to whether it?s worth
that.

Out of the 4 bikes I own only the Gravel bike hits that level for me!

Considering your usage and that the tyres available to the CatTrike are on >>> the more durable than racy side, can?t imagine tubeless being a thing, let >>> alone getting compatible wheels, certainly for the front 20in wheels, might >>> be possible for the rear, ie models with a 700c rear wheel.

--
C'est bon
Soloman

Roger Merriman

I was talking about not using slime goop with tube tires. There are
even tubes available with goop already in them.

Yup they have been around a few decades now, fairly ineffective in
comparison to tubeless.

FWIW, there are "racy" tires available for 26 and 20 inch tires.
Schwalbe also makes a 20 inch tubeless tire.

For 26inch yes, they do a Pro one and TT ie full on road race tubless,
20inch itAs tube only for the road tyre ie the one and various Marathon >models.

Which makes sense as 26inch there will be tubeless rims being still made,
as MTB was way ahead of road as ever.

20inch is generally more utilitarian bikes and kids bikes so IAd be very >surprised if a tubeless rim in that size was ever made.

--
C'est bon
Soloman

Roger Merriman

https://www.modernbike.com/product-2126342470?TID=394&msclkid=5360b70dd9e51613cc16dfa017152e6d

--
C'est bon
Soloman
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

Catrike Ryder <Soloman@old.bikers.org> wrote:

On Tue, 26 Aug 2025 08:47:10 -0500, AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 8:03 AM, Catrike Ryder wrote:

On 26 Aug 2025 11:21:05 GMT, Roger Merriman <roger@sarlet.com> wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I
got it the manual didn't say it was set up for schrader valves so since
the parts are all blackit took me a half hour to figure out that I had
to remove the rubber plug and the replace it with the Preta valve >>>>>>>>>> fitting. Then the pump would not turn on though the charge was full. >>>>>>>>>>
Finally I stuck a screwdriver in the air exit and this moved the pumping
mechanism slightly and it operated fine after that.

With Silca tubeless sealant and tubeless tires you'd probably only have
to carry this pump on the bike. I'll let you know how that works out.
The Silca sealant is supposed to close 6 mm holes and I never had a >>>>>>>>>> tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable.

No somewhat optimistically Silca and others do claim 6mm.

<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower >>>>>>>> pressures, though I?ve found it (tubeless) is fairly reliable with thorn
holes, less so for slashes be that flint or glass.

Hence my roadie commuter has tubes and tyres with protection so I don?t
need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things:
https://www.yellowjersey.org/photosfromthepast/cciround.jpg
is necessarily big enough to have rent the fabric severely.

I'm among the skeptical as well. But I hesitate calling Silca liars so I >>>>>> will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and
report back.

A slash is more likely to be sealed, than a circular hole which is likely >>>> to have a 100% failure!

I-Ave certainly had thorn and small flint slashes seal, the offending object
is always gone. So a few MM though some way off 6/7mm which is the upper >>>> limit, and has tyre pressure increases it-As even less likely, hence this >>>> works better with MTB tyres.

Roger Merriman

I'll pass. I understand the slime sealants make a mess on the inside
of your tires.

--
C'est bon
Soloman

under a minute:

https://www.youtube.com/watch?v=2MEXNj-4hVg

https://www.youtube.com/watch?v=N3BPzTXYlKI

This is about 22 minutes but thorough and informative:
https://www.youtube.com/watch?v=lEHwQ2yr84w

I read about a guy eventually trashing a wheel after getting a serious
flat with one of the preslimed tubes. I'm not going to go that route.

How? By what means? If the tube had a catastrophic failure ie burst you
could crack the rim. But same goes for any other tube. And takes some
impact to do so, way beyond what is reasonably expected.

And yes IrCOd missed or forgotten that BMX use 20inch wheels and have gone tubeless which probably makes sense.

--
C'est bon
Soloman

Roger Merriman


--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On 8/26/2025 11:02 AM, Roger Merriman wrote:

Catrike Ryder <Soloman@old.bikers.org> wrote:

On Tue, 26 Aug 2025 08:47:10 -0500, AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 8:03 AM, Catrike Ryder wrote:

On 26 Aug 2025 11:21:05 GMT, Roger Merriman <roger@sarlet.com> wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I
got it the manual didn't say it was set up for schrader valves so since
the parts are all blackit took me a half hour to figure out that I had
to remove the rubber plug and the replace it with the Preta valve >>>>>>>>>>> fitting. Then the pump would not turn on though the charge was full.

Finally I stuck a screwdriver in the air exit and this moved the pumping
mechanism slightly and it operated fine after that.

With Silca tubeless sealant and tubeless tires you'd probably only have
to carry this pump on the bike. I'll let you know how that works out.
The Silca sealant is supposed to close 6 mm holes and I never had a >>>>>>>>>>> tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable.

No somewhat optimistically Silca and others do claim 6mm.

<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower >>>>>>>>> pressures, though I?ve found it (tubeless) is fairly reliable with thorn
holes, less so for slashes be that flint or glass.

Hence my roadie commuter has tubes and tyres with protection so I don?t
need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things:
https://www.yellowjersey.org/photosfromthepast/cciround.jpg
is necessarily big enough to have rent the fabric severely.

I'm among the skeptical as well. But I hesitate calling Silca liars so I
will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and
report back.

A slash is more likely to be sealed, than a circular hole which is likely >>>>> to have a 100% failure!

I-Ave certainly had thorn and small flint slashes seal, the offending object
is always gone. So a few MM though some way off 6/7mm which is the upper >>>>> limit, and has tyre pressure increases it-As even less likely, hence this >>>>> works better with MTB tyres.

Roger Merriman

I'll pass. I understand the slime sealants make a mess on the inside
of your tires.

--
C'est bon
Soloman

under a minute:

https://www.youtube.com/watch?v=2MEXNj-4hVg

https://www.youtube.com/watch?v=N3BPzTXYlKI

This is about 22 minutes but thorough and informative:
https://www.youtube.com/watch?v=lEHwQ2yr84w

I read about a guy eventually trashing a wheel after getting a serious
flat with one of the preslimed tubes. I'm not going to go that route.

How? By what means? If the tube had a catastrophic failure ie burst you
could crack the rim. But same goes for any other tube. And takes some
impact to do so, way beyond what is reasonably expected.

And yes IrCOd missed or forgotten that BMX use 20inch wheels and have gone tubeless which probably makes sense.

--
C'est bon
Soloman

Roger Merriman

Maybe, but more commonly the tire leaves the rim, which gets
scuffed/abraded on the pavement.

https://www.reddit.com/r/ebikes/comments/14tlgs9/this_is_what_happens_when_you_have_a_catastrophic/
--
Andrew Muzi
am@yellowjersey.org
Open every day since 1 April, 1971
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 11:02 AM, Roger Merriman wrote:

Catrike Ryder <Soloman@old.bikers.org> wrote:

On Tue, 26 Aug 2025 08:47:10 -0500, AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 8:03 AM, Catrike Ryder wrote:

On 26 Aug 2025 11:21:05 GMT, Roger Merriman <roger@sarlet.com> wrote: >>>>>

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I
got it the manual didn't say it was set up for schrader valves so since
the parts are all blackit took me a half hour to figure out that I had
to remove the rubber plug and the replace it with the Preta valve >>>>>>>>>>>> fitting. Then the pump would not turn on though the charge was full.

Finally I stuck a screwdriver in the air exit and this moved the pumping
mechanism slightly and it operated fine after that.

With Silca tubeless sealant and tubeless tires you'd probably only have
to carry this pump on the bike. I'll let you know how that works out.
The Silca sealant is supposed to close 6 mm holes and I never had a
tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable.

No somewhat optimistically Silca and others do claim 6mm.

<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower >>>>>>>>>> pressures, though I?ve found it (tubeless) is fairly reliable with thorn
holes, less so for slashes be that flint or glass.

Hence my roadie commuter has tubes and tyres with protection so I don?t
need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things:
https://www.yellowjersey.org/photosfromthepast/cciround.jpg
is necessarily big enough to have rent the fabric severely.

I'm among the skeptical as well. But I hesitate calling Silca liars so I
will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and
report back.

A slash is more likely to be sealed, than a circular hole which is likely
to have a 100% failure!

I-Ave certainly had thorn and small flint slashes seal, the offending object
is always gone. So a few MM though some way off 6/7mm which is the upper >>>>>> limit, and has tyre pressure increases it-As even less likely, hence this
works better with MTB tyres.

Roger Merriman

I'll pass. I understand the slime sealants make a mess on the inside >>>>> of your tires.

--
C'est bon
Soloman

under a minute:

https://www.youtube.com/watch?v=2MEXNj-4hVg

https://www.youtube.com/watch?v=N3BPzTXYlKI

This is about 22 minutes but thorough and informative:
https://www.youtube.com/watch?v=lEHwQ2yr84w

I read about a guy eventually trashing a wheel after getting a serious
flat with one of the preslimed tubes. I'm not going to go that route.

How? By what means? If the tube had a catastrophic failure ie burst you
could crack the rim. But same goes for any other tube. And takes some
impact to do so, way beyond what is reasonably expected.

And yes IrCOd missed or forgotten that BMX use 20inch wheels and have gone >> tubeless which probably makes sense.

--
C'est bon
Soloman

Roger Merriman

Maybe, but more commonly the tire leaves the rim, which gets
scuffed/abraded on the pavement.

https://www.reddit.com/r/ebikes/comments/14tlgs9/this_is_what_happens_when_you_have_a_catastrophic/

I have heard of that, some road bike tyres had rumours of sidewall failures years back for example, but canrCOt see how a slime or copies ie sealant
filled tube, can introduce a failure for either wheel or tyre, over
standard tubes. I might be wary of the very cheap TPU as they have plastic valves etc that to be vaguely on topic donrCOt like being heated up from
being pumped up by an electric pump.

They apparently do get fairly warm.

Roger Merriman

--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On 8/26/2025 11:58 AM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 11:02 AM, Roger Merriman wrote:

Catrike Ryder <Soloman@old.bikers.org> wrote:

On Tue, 26 Aug 2025 08:47:10 -0500, AMuzi <am@yellowjersey.org> wrote: >>>>

On 8/26/2025 8:03 AM, Catrike Ryder wrote:

On 26 Aug 2025 11:21:05 GMT, Roger Merriman <roger@sarlet.com> wrote: >>>>>>

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I
got it the manual didn't say it was set up for schrader valves so since
the parts are all blackit took me a half hour to figure out that I had
to remove the rubber plug and the replace it with the Preta valve >>>>>>>>>>>>> fitting. Then the pump would not turn on though the charge was full.

Finally I stuck a screwdriver in the air exit and this moved the pumping
mechanism slightly and it operated fine after that.

With Silca tubeless sealant and tubeless tires you'd probably only have
to carry this pump on the bike. I'll let you know how that works out.
The Silca sealant is supposed to close 6 mm holes and I never had a
tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable.

No somewhat optimistically Silca and others do claim 6mm. >>>>>>>>>>>
<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower >>>>>>>>>>> pressures, though I?ve found it (tubeless) is fairly reliable with thorn
holes, less so for slashes be that flint or glass.

Hence my roadie commuter has tubes and tyres with protection so I don?t
need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things:
https://www.yellowjersey.org/photosfromthepast/cciround.jpg >>>>>>>>>> is necessarily big enough to have rent the fabric severely. >>>>>>>>>

I'm among the skeptical as well. But I hesitate calling Silca liars so I
will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and
report back.

A slash is more likely to be sealed, than a circular hole which is likely
to have a 100% failure!

I-Ave certainly had thorn and small flint slashes seal, the offending object
is always gone. So a few MM though some way off 6/7mm which is the upper
limit, and has tyre pressure increases it-As even less likely, hence this
works better with MTB tyres.

Roger Merriman

I'll pass. I understand the slime sealants make a mess on the inside >>>>>> of your tires.

--
C'est bon
Soloman

under a minute:

https://www.youtube.com/watch?v=2MEXNj-4hVg

https://www.youtube.com/watch?v=N3BPzTXYlKI

This is about 22 minutes but thorough and informative:
https://www.youtube.com/watch?v=lEHwQ2yr84w

I read about a guy eventually trashing a wheel after getting a serious >>>> flat with one of the preslimed tubes. I'm not going to go that route.

How? By what means? If the tube had a catastrophic failure ie burst you
could crack the rim. But same goes for any other tube. And takes some
impact to do so, way beyond what is reasonably expected.

And yes IrCOd missed or forgotten that BMX use 20inch wheels and have gone >>> tubeless which probably makes sense.

--
C'est bon
Soloman

Roger Merriman

Maybe, but more commonly the tire leaves the rim, which gets
scuffed/abraded on the pavement.

https://www.reddit.com/r/ebikes/comments/14tlgs9/this_is_what_happens_when_you_have_a_catastrophic/

I have heard of that, some road bike tyres had rumours of sidewall failures years back for example, but canrCOt see how a slime or copies ie sealant filled tube, can introduce a failure for either wheel or tyre, over
standard tubes. I might be wary of the very cheap TPU as they have plastic valves etc that to be vaguely on topic donrCOt like being heated up from being pumped up by an electric pump.

They apparently do get fairly warm.

Roger Merriman

Good point. The goop doesn't _cause_ the tire to demount.

That said, as with the reddit author above, using goop to
avoid replacement of worn/leaking systems can exacerbate the
likelihood of failure on the road. Or offroad, as the case
may be.

"also got sprayed by slime. All because I was a cheapskate
and wanted to wear down the old tire before buying new ones.
Now I bought two new tires and a new rear wheel. "
--
Andrew Muzi
am@yellowjersey.org
Open every day since 1 April, 1971
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 11:58 AM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 11:02 AM, Roger Merriman wrote:

Catrike Ryder <Soloman@old.bikers.org> wrote:

On Tue, 26 Aug 2025 08:47:10 -0500, AMuzi <am@yellowjersey.org> wrote: >>>>>

On 8/26/2025 8:03 AM, Catrike Ryder wrote:

On 26 Aug 2025 11:21:05 GMT, Roger Merriman <roger@sarlet.com> wrote: >>>>>>>

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I
got it the manual didn't say it was set up for schrader valves so since
the parts are all blackit took me a half hour to figure out that I had
to remove the rubber plug and the replace it with the Preta valve
fitting. Then the pump would not turn on though the charge was full.

Finally I stuck a screwdriver in the air exit and this moved the pumping
mechanism slightly and it operated fine after that. >>>>>>>>>>>>>>
With Silca tubeless sealant and tubeless tires you'd probably only have
to carry this pump on the bike. I'll let you know how that works out.
The Silca sealant is supposed to close 6 mm holes and I never had a
tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable. >>>>>>>>>>>>>

No somewhat optimistically Silca and others do claim 6mm. >>>>>>>>>>>>
<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower
pressures, though I?ve found it (tubeless) is fairly reliable with thorn
holes, less so for slashes be that flint or glass.

Hence my roadie commuter has tubes and tyres with protection so I don?t
need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things: >>>>>>>>>>> https://www.yellowjersey.org/photosfromthepast/cciround.jpg >>>>>>>>>>> is necessarily big enough to have rent the fabric severely. >>>>>>>>>>

I'm among the skeptical as well. But I hesitate calling Silca liars so I
will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and
report back.

A slash is more likely to be sealed, than a circular hole which is likely
to have a 100% failure!

I-Ave certainly had thorn and small flint slashes seal, the offending object
is always gone. So a few MM though some way off 6/7mm which is the upper
limit, and has tyre pressure increases it-As even less likely, hence this
works better with MTB tyres.

Roger Merriman

I'll pass. I understand the slime sealants make a mess on the inside >>>>>>> of your tires.

--
C'est bon
Soloman

under a minute:

https://www.youtube.com/watch?v=2MEXNj-4hVg

https://www.youtube.com/watch?v=N3BPzTXYlKI

This is about 22 minutes but thorough and informative:
https://www.youtube.com/watch?v=lEHwQ2yr84w

I read about a guy eventually trashing a wheel after getting a serious >>>>> flat with one of the preslimed tubes. I'm not going to go that route. >>>>

How? By what means? If the tube had a catastrophic failure ie burst you >>>> could crack the rim. But same goes for any other tube. And takes some
impact to do so, way beyond what is reasonably expected.

And yes IrCOd missed or forgotten that BMX use 20inch wheels and have gone >>>> tubeless which probably makes sense.

--
C'est bon
Soloman

Roger Merriman

Maybe, but more commonly the tire leaves the rim, which gets
scuffed/abraded on the pavement.

https://www.reddit.com/r/ebikes/comments/14tlgs9/this_is_what_happens_when_you_have_a_catastrophic/

I have heard of that, some road bike tyres had rumours of sidewall failures >> years back for example, but canrCOt see how a slime or copies ie sealant
filled tube, can introduce a failure for either wheel or tyre, over
standard tubes. I might be wary of the very cheap TPU as they have plastic >> valves etc that to be vaguely on topic donrCOt like being heated up from
being pumped up by an electric pump.

They apparently do get fairly warm.

Roger Merriman

Good point. The goop doesn't _cause_ the tire to demount.

That said, as with the reddit author above, using goop to
avoid replacement of worn/leaking systems can exacerbate the
likelihood of failure on the road. Or offroad, as the case
may be.

"also got sprayed by slime. All because I was a cheapskate
and wanted to wear down the old tire before buying new ones.
Now I bought two new tires and a new rear wheel. "

Indeed never underestimate human ability to make poor choices! Encountered someone who had dislocated his shoulder yesterday after trying to ride some
of the very technical trails (was a bank holiday) on a 30+ year old
specialised yes it was full suspension but it was utterly unsuitable for
such trails! Got him in the sling and so on.

Roger Merriman

--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On 26 Aug 2025 16:02:11 GMT, Roger Merriman <roger@sarlet.com> wrote:

Catrike Ryder <Soloman@old.bikers.org> wrote:

On Tue, 26 Aug 2025 08:47:10 -0500, AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 8:03 AM, Catrike Ryder wrote:

On 26 Aug 2025 11:21:05 GMT, Roger Merriman <roger@sarlet.com> wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I
got it the manual didn't say it was set up for schrader valves so since
the parts are all blackit took me a half hour to figure out that I had
to remove the rubber plug and the replace it with the Preta valve >>>>>>>>>>> fitting. Then the pump would not turn on though the charge was full.

Finally I stuck a screwdriver in the air exit and this moved the pumping
mechanism slightly and it operated fine after that.

With Silca tubeless sealant and tubeless tires you'd probably only have
to carry this pump on the bike. I'll let you know how that works out.
The Silca sealant is supposed to close 6 mm holes and I never had a >>>>>>>>>>> tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable.

No somewhat optimistically Silca and others do claim 6mm.

<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower >>>>>>>>> pressures, though I?ve found it (tubeless) is fairly reliable with thorn
holes, less so for slashes be that flint or glass.

Hence my roadie commuter has tubes and tyres with protection so I don?t
need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things:
https://www.yellowjersey.org/photosfromthepast/cciround.jpg
is necessarily big enough to have rent the fabric severely.

I'm among the skeptical as well. But I hesitate calling Silca liars so I
will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and
report back.

A slash is more likely to be sealed, than a circular hole which is likely >>>>> to have a 100% failure!

I?ve certainly had thorn and small flint slashes seal, the offending object
is always gone. So a few MM though some way off 6/7mm which is the upper >>>>> limit, and has tyre pressure increases it?s even less likely, hence this >>>>> works better with MTB tyres.

Roger Merriman

I'll pass. I understand the slime sealants make a mess on the inside
of your tires.

--
C'est bon
Soloman

under a minute:

https://www.youtube.com/watch?v=2MEXNj-4hVg

https://www.youtube.com/watch?v=N3BPzTXYlKI

This is about 22 minutes but thorough and informative:
https://www.youtube.com/watch?v=lEHwQ2yr84w

I read about a guy eventually trashing a wheel after getting a serious
flat with one of the preslimed tubes. I'm not going to go that route.

How? By what means? If the tube had a catastrophic failure ie burst you
could crack the rim. But same goes for any other tube. And takes some
impact to do so, way beyond what is reasonably expected.

And yes IAd missed or forgotten that BMX use 20inch wheels and have gone >tubeless which probably makes sense.

--
C'est bon
Soloman

Roger Merriman

He trashed the wheel because it was coated with goop.

There are several fairly high quality small fold-up bikes that use 20
inch wheels, too.

https://bikefriday.com/

--
C'est bon
Soloman
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On 26 Aug 2025 17:17:00 GMT, Roger Merriman <roger@sarlet.com> wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 11:58 AM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 11:02 AM, Roger Merriman wrote:

Catrike Ryder <Soloman@old.bikers.org> wrote:

On Tue, 26 Aug 2025 08:47:10 -0500, AMuzi <am@yellowjersey.org> wrote: >>>>>>

On 8/26/2025 8:03 AM, Catrike Ryder wrote:

On 26 Aug 2025 11:21:05 GMT, Roger Merriman <roger@sarlet.com> wrote: >>>>>>>>

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I
got it the manual didn't say it was set up for schrader valves so since
the parts are all blackit took me a half hour to figure out that I had
to remove the rubber plug and the replace it with the Preta valve
fitting. Then the pump would not turn on though the charge was full.

Finally I stuck a screwdriver in the air exit and this moved the pumping
mechanism slightly and it operated fine after that. >>>>>>>>>>>>>>>
With Silca tubeless sealant and tubeless tires you'd probably only have
to carry this pump on the bike. I'll let you know how that works out.
The Silca sealant is supposed to close 6 mm holes and I never had a
tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable. >>>>>>>>>>>>>>

No somewhat optimistically Silca and others do claim 6mm. >>>>>>>>>>>>>
<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower
pressures, though I?ve found it (tubeless) is fairly reliable with thorn
holes, less so for slashes be that flint or glass.

Hence my roadie commuter has tubes and tyres with protection so I don?t
need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things: >>>>>>>>>>>> https://www.yellowjersey.org/photosfromthepast/cciround.jpg >>>>>>>>>>>> is necessarily big enough to have rent the fabric severely. >>>>>>>>>>>

I'm among the skeptical as well. But I hesitate calling Silca liars so I
will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and >>>>>>>>>> report back.

A slash is more likely to be sealed, than a circular hole which is likely
to have a 100% failure!

I?ve certainly had thorn and small flint slashes seal, the offending object
is always gone. So a few MM though some way off 6/7mm which is the upper
limit, and has tyre pressure increases it?s even less likely, hence this
works better with MTB tyres.

Roger Merriman

I'll pass. I understand the slime sealants make a mess on the inside >>>>>>>> of your tires.

--
C'est bon
Soloman

under a minute:

https://www.youtube.com/watch?v=2MEXNj-4hVg

https://www.youtube.com/watch?v=N3BPzTXYlKI

This is about 22 minutes but thorough and informative:
https://www.youtube.com/watch?v=lEHwQ2yr84w

I read about a guy eventually trashing a wheel after getting a serious >>>>>> flat with one of the preslimed tubes. I'm not going to go that route. >>>>>

How? By what means? If the tube had a catastrophic failure ie burst you >>>>> could crack the rim. But same goes for any other tube. And takes some >>>>> impact to do so, way beyond what is reasonably expected.

And yes IAd missed or forgotten that BMX use 20inch wheels and have gone >>>>> tubeless which probably makes sense.

--
C'est bon
Soloman

Roger Merriman

Maybe, but more commonly the tire leaves the rim, which gets
scuffed/abraded on the pavement.

https://www.reddit.com/r/ebikes/comments/14tlgs9/this_is_what_happens_when_you_have_a_catastrophic/

I have heard of that, some road bike tyres had rumours of sidewall failures >>> years back for example, but canAt see how a slime or copies ie sealant
filled tube, can introduce a failure for either wheel or tyre, over
standard tubes. I might be wary of the very cheap TPU as they have plastic >>> valves etc that to be vaguely on topic donAt like being heated up from
being pumped up by an electric pump.

They apparently do get fairly warm.

Roger Merriman

Good point. The goop doesn't _cause_ the tire to demount.

That said, as with the reddit author above, using goop to
avoid replacement of worn/leaking systems can exacerbate the
likelihood of failure on the road. Or offroad, as the case
may be.

"also got sprayed by slime. All because I was a cheapskate
and wanted to wear down the old tire before buying new ones.
Now I bought two new tires and a new rear wheel. "

Indeed never underestimate human ability to make poor choices! Encountered >someone who had dislocated his shoulder yesterday after trying to ride some >of the very technical trails (was a bank holiday) on a 30+ year old >specialised yes it was full suspension but it was utterly unsuitable for
such trails! Got him in the sling and so on.

Roger Merriman

Making poor choices is a learning experience. Better than simply being
told what to do.

--
C'est bon
Soloman
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On Tue, 26 Aug 2025 07:54:17 -0500, AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 12:00 AM, Jeff Liebermann wrote:

On Mon, 25 Aug 2025 17:58:44 -0500, AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I
got it the manual didn't say it was set up for schrader valves so since
the parts are all blackit took me a half hour to figure out that I had >>>>>>>> to remove the rubber plug and the replace it with the Preta valve >>>>>>>> fitting. Then the pump would not turn on though the charge was full. >>>>>>>>
Finally I stuck a screwdriver in the air exit and this moved the pumping
mechanism slightly and it operated fine after that.

With Silca tubeless sealant and tubeless tires you'd probably only have
to carry this pump on the bike. I'll let you know how that works out. >>>>>>>> The Silca sealant is supposed to close 6 mm holes and I never had a >>>>>>>> tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable.

No somewhat optimistically Silca and others do claim 6mm.

<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower >>>>>> pressures, though I?ve found it (tubeless) is fairly reliable with thorn >>>>>> holes, less so for slashes be that flint or glass.

Hence my roadie commuter has tubes and tyres with protection so I don?t >>>>>> need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things:
https://www.yellowjersey.org/photosfromthepast/cciround.jpg
is necessarily big enough to have rent the fabric severely.

I'm among the skeptical as well. But I hesitate calling Silca liars so I will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and
report back.

This might be useful information for someone living in Tom's
neighborhood.

"how many TIRES does it take to stop a bullet?"
<https://www.youtube.com/watch?v=rX-3SRqdjWw>
He starts off with a .22LR.

When I was younger and dumber, we were shooting at big heavy tractor
tires with .22LR from about 25ft. We were warned that the bullet
might bounce back in our direction. After about 50 rounds, one bullet
broke a window about 50 ft behind us. Oops. After that, the
consensus was that shooting at hard rubber targets was a really bad
idea.

Yes that's right especially for thick truck tires.

True. This was a from some kind of agricultural tractor, about 4ft
diameter. It was big, thick and quite heavy. I don't recall if it
had a wire cord.

Bicycle
tires are a different thing, more like a cardboard target. I
measured the openings in a cardboard box target from 50
feet. They are about 6mm. (point blank would just shred a tire)

The hole size might also depend on the type of bullet. If it was a
variation of a hollow point, it would make a larger diameter hole than
a conventional "round nose" bullet. I couldn't find a .22LR
wadcutter, which would make a clean circular hole. Some examples: "Hollow-point Your Own .22LRs" <https://americanhandgunner.com/gear/beat-the-ammo-shortage/>
"A Comprehensive Guide to Wadcutter Bullets" <https://www.berrysmfg.com/a-comprehensive-guide-to-wadcutter-bullets/>

My suggestion was admittedly tongue in cheek

As are most of my replies and retorts. Note that tongue-and-cheek is
a miniature version of foot-in-mouth.

as piercing a
tire without rim damage is not very likely. Still and all, a
6mm hole in a bicycle tire is a major catastrophic injury.
Moreso for thin fabric high pressure road tires, less so for
low pressure 26x5 and the like.

Looking at a 5mm bolt (I couldn't find a 6mm), riding over something
that produced a hole that size in the tire would be a major
achievement. It's like trying to shoot at a block of ballistic gel to
measure penetration. Even a much larger bullet will produce a fairly
small "hole" in the gel[1]. That's because the bullet does not remove
gel material from the hole. A hole in a tire is much the same as the
ballistic gel. The rubber expands as the bullet goes through, The
rubber then returns to almost its original shape, leaving only a small
hole. I would guess(tm) that 0.6mm is a more likely hole size.


[1] I'm referring to the entry hole, not the exit hole (if any), and
not the expansion of the bullet path caused by hydraulic pressure. If
you weighed the block of ballistic gel, where the bullet does not exit
the block, the before and after weights will be identical thus
demonstrating that no gel was lost.

"The basics of ballistic gelatin testing" <https://www.norma-ammunition.com/en-gb/norma-academy/dedicated-components/ballistics/the-basics-of-ballistic-gelatin-testing>
--
Jeff Liebermann jeffl@cruzio.com
PO Box 272 http://www.LearnByDestroying.com
Ben Lomond CA 95005-0272
Skype: JeffLiebermann AE6KS 831-336-2558
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

Catrike Ryder <Soloman@old.bikers.org> wrote:

On 26 Aug 2025 17:17:00 GMT, Roger Merriman <roger@sarlet.com> wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 11:58 AM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 11:02 AM, Roger Merriman wrote:

Catrike Ryder <Soloman@old.bikers.org> wrote:

On Tue, 26 Aug 2025 08:47:10 -0500, AMuzi <am@yellowjersey.org> wrote: >>>>>>>

On 8/26/2025 8:03 AM, Catrike Ryder wrote:

On 26 Aug 2025 11:21:05 GMT, Roger Merriman <roger@sarlet.com> wrote: >>>>>>>>>

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I
got it the manual didn't say it was set up for schrader valves so since
the parts are all blackit took me a half hour to figure out that I had
to remove the rubber plug and the replace it with the Preta valve
fitting. Then the pump would not turn on though the charge was full.

Finally I stuck a screwdriver in the air exit and this moved the pumping
mechanism slightly and it operated fine after that. >>>>>>>>>>>>>>>>
With Silca tubeless sealant and tubeless tires you'd probably only have
to carry this pump on the bike. I'll let you know how that works out.
The Silca sealant is supposed to close 6 mm holes and I never had a
tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable. >>>>>>>>>>>>>>>

No somewhat optimistically Silca and others do claim 6mm. >>>>>>>>>>>>>>
<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower
pressures, though I?ve found it (tubeless) is fairly reliable with thorn
holes, less so for slashes be that flint or glass. >>>>>>>>>>>>>>
Hence my roadie commuter has tubes and tyres with protection so I don?t
need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things: >>>>>>>>>>>>> https://www.yellowjersey.org/photosfromthepast/cciround.jpg >>>>>>>>>>>>> is necessarily big enough to have rent the fabric severely. >>>>>>>>>>>>

I'm among the skeptical as well. But I hesitate calling Silca liars so I
will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and >>>>>>>>>>> report back.

A slash is more likely to be sealed, than a circular hole which is likely
to have a 100% failure!

I?ve certainly had thorn and small flint slashes seal, the offending object
is always gone. So a few MM though some way off 6/7mm which is the upper
limit, and has tyre pressure increases it?s even less likely, hence this
works better with MTB tyres.

Roger Merriman

I'll pass. I understand the slime sealants make a mess on the inside >>>>>>>>> of your tires.

--
C'est bon
Soloman

under a minute:

https://www.youtube.com/watch?v=2MEXNj-4hVg

https://www.youtube.com/watch?v=N3BPzTXYlKI

This is about 22 minutes but thorough and informative:
https://www.youtube.com/watch?v=lEHwQ2yr84w

I read about a guy eventually trashing a wheel after getting a serious >>>>>>> flat with one of the preslimed tubes. I'm not going to go that route. >>>>>>

How? By what means? If the tube had a catastrophic failure ie burst you >>>>>> could crack the rim. But same goes for any other tube. And takes some >>>>>> impact to do so, way beyond what is reasonably expected.

And yes I-Ad missed or forgotten that BMX use 20inch wheels and have gone
tubeless which probably makes sense.

--
C'est bon
Soloman

Roger Merriman

Maybe, but more commonly the tire leaves the rim, which gets
scuffed/abraded on the pavement.

https://www.reddit.com/r/ebikes/comments/14tlgs9/this_is_what_happens_when_you_have_a_catastrophic/

I have heard of that, some road bike tyres had rumours of sidewall failures
years back for example, but can-At see how a slime or copies ie sealant >>>> filled tube, can introduce a failure for either wheel or tyre, over
standard tubes. I might be wary of the very cheap TPU as they have plastic >>>> valves etc that to be vaguely on topic don-At like being heated up from >>>> being pumped up by an electric pump.

They apparently do get fairly warm.

Roger Merriman

Good point. The goop doesn't _cause_ the tire to demount.

That said, as with the reddit author above, using goop to
avoid replacement of worn/leaking systems can exacerbate the
likelihood of failure on the road. Or offroad, as the case
may be.

"also got sprayed by slime. All because I was a cheapskate
and wanted to wear down the old tire before buying new ones.
Now I bought two new tires and a new rear wheel. "

Indeed never underestimate human ability to make poor choices! Encountered >> someone who had dislocated his shoulder yesterday after trying to ride some >> of the very technical trails (was a bank holiday) on a 30+ year old
specialised yes it was full suspension but it was utterly unsuitable for
such trails! Got him in the sling and so on.

Roger Merriman

Making poor choices is a learning experience. Better than simply being
told what to do.

Ish Pitch hill has with a few exceptions very technical trails off the
steep slopes, this isnrCOt the place to just have a go! If herCOd need to be very talented rider to overcome the older design.

Ie was fairly inevitable, absolutely is fun to see how far can push stuff, hence I cooked the rotor on the Gravel bike, sometimes is fun to push it.

But modern trails and bikes have advanced hugely so this sort of thing is
way beyond what the bike was designed for.

--
C'est bon
Soloman

Roger Merriman


--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

Catrike Ryder <Soloman@old.bikers.org> wrote:

On 26 Aug 2025 16:02:11 GMT, Roger Merriman <roger@sarlet.com> wrote:

Catrike Ryder <Soloman@old.bikers.org> wrote:

On Tue, 26 Aug 2025 08:47:10 -0500, AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 8:03 AM, Catrike Ryder wrote:

On 26 Aug 2025 11:21:05 GMT, Roger Merriman <roger@sarlet.com> wrote: >>>>>

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I
got it the manual didn't say it was set up for schrader valves so since
the parts are all blackit took me a half hour to figure out that I had
to remove the rubber plug and the replace it with the Preta valve >>>>>>>>>>>> fitting. Then the pump would not turn on though the charge was full.

Finally I stuck a screwdriver in the air exit and this moved the pumping
mechanism slightly and it operated fine after that.

With Silca tubeless sealant and tubeless tires you'd probably only have
to carry this pump on the bike. I'll let you know how that works out.
The Silca sealant is supposed to close 6 mm holes and I never had a
tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable.

No somewhat optimistically Silca and others do claim 6mm.

<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower >>>>>>>>>> pressures, though I?ve found it (tubeless) is fairly reliable with thorn
holes, less so for slashes be that flint or glass.

Hence my roadie commuter has tubes and tyres with protection so I don?t
need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things:
https://www.yellowjersey.org/photosfromthepast/cciround.jpg
is necessarily big enough to have rent the fabric severely.

I'm among the skeptical as well. But I hesitate calling Silca liars so I
will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and
report back.

A slash is more likely to be sealed, than a circular hole which is likely
to have a 100% failure!

I?ve certainly had thorn and small flint slashes seal, the offending object
is always gone. So a few MM though some way off 6/7mm which is the upper >>>>>> limit, and has tyre pressure increases it?s even less likely, hence this >>>>>> works better with MTB tyres.

Roger Merriman

I'll pass. I understand the slime sealants make a mess on the inside >>>>> of your tires.

--
C'est bon
Soloman

under a minute:

https://www.youtube.com/watch?v=2MEXNj-4hVg

https://www.youtube.com/watch?v=N3BPzTXYlKI

This is about 22 minutes but thorough and informative:
https://www.youtube.com/watch?v=lEHwQ2yr84w

I read about a guy eventually trashing a wheel after getting a serious
flat with one of the preslimed tubes. I'm not going to go that route.

How? By what means? If the tube had a catastrophic failure ie burst you
could crack the rim. But same goes for any other tube. And takes some
impact to do so, way beyond what is reasonably expected.

And yes I-Ad missed or forgotten that BMX use 20inch wheels and have gone
tubeless which probably makes sense.

--
C'est bon
Soloman

Roger Merriman

He trashed the wheel because it was coated with goop.

ItrCOs going to eat a rim or even a tyre sidewall, itrCOs not even Dot fluid level of nastiness itrCOs fairly benign stuff, it doesnrCOt wash out of clothes and donrCOt think it should go into drains but it certainly has no effect on wheels or tyres.

There are several fairly high quality small fold-up bikes that use 20
inch wheels, too.

https://bikefriday.com/

Yes and few others but they are extremely rare I see a Molton bike or two
most summers as itrCOs that sort of area, but they are rare.

--
C'est bon
Soloman

Roger Merriman
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On 26 Aug 2025 18:02:31 GMT, Roger Merriman <roger@sarlet.com> wrote:

Catrike Ryder <Soloman@old.bikers.org> wrote:

On 26 Aug 2025 17:17:00 GMT, Roger Merriman <roger@sarlet.com> wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 11:58 AM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 11:02 AM, Roger Merriman wrote:

Catrike Ryder <Soloman@old.bikers.org> wrote:

On Tue, 26 Aug 2025 08:47:10 -0500, AMuzi <am@yellowjersey.org> wrote: >>>>>>>>

On 8/26/2025 8:03 AM, Catrike Ryder wrote:

On 26 Aug 2025 11:21:05 GMT, Roger Merriman <roger@sarlet.com> wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I
got it the manual didn't say it was set up for schrader valves so since
the parts are all blackit took me a half hour to figure out that I had
to remove the rubber plug and the replace it with the Preta valve
fitting. Then the pump would not turn on though the charge was full.

Finally I stuck a screwdriver in the air exit and this moved the pumping
mechanism slightly and it operated fine after that. >>>>>>>>>>>>>>>>>
With Silca tubeless sealant and tubeless tires you'd probably only have
to carry this pump on the bike. I'll let you know how that works out.
The Silca sealant is supposed to close 6 mm holes and I never had a
tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable. >>>>>>>>>>>>>>>>

No somewhat optimistically Silca and others do claim 6mm. >>>>>>>>>>>>>>>
<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower
pressures, though I?ve found it (tubeless) is fairly reliable with thorn
holes, less so for slashes be that flint or glass. >>>>>>>>>>>>>>>
Hence my roadie commuter has tubes and tyres with protection so I don?t
need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things: >>>>>>>>>>>>>> https://www.yellowjersey.org/photosfromthepast/cciround.jpg >>>>>>>>>>>>>> is necessarily big enough to have rent the fabric severely. >>>>>>>>>>>>>

I'm among the skeptical as well. But I hesitate calling Silca liars so I
will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and >>>>>>>>>>>> report back.

A slash is more likely to be sealed, than a circular hole which is likely
to have a 100% failure!

I?ve certainly had thorn and small flint slashes seal, the offending object
is always gone. So a few MM though some way off 6/7mm which is the upper
limit, and has tyre pressure increases it?s even less likely, hence this
works better with MTB tyres.

Roger Merriman

I'll pass. I understand the slime sealants make a mess on the inside >>>>>>>>>> of your tires.

--
C'est bon
Soloman

under a minute:

https://www.youtube.com/watch?v=2MEXNj-4hVg

https://www.youtube.com/watch?v=N3BPzTXYlKI

This is about 22 minutes but thorough and informative:
https://www.youtube.com/watch?v=lEHwQ2yr84w

I read about a guy eventually trashing a wheel after getting a serious >>>>>>>> flat with one of the preslimed tubes. I'm not going to go that route. >>>>>>>

How? By what means? If the tube had a catastrophic failure ie burst you >>>>>>> could crack the rim. But same goes for any other tube. And takes some >>>>>>> impact to do so, way beyond what is reasonably expected.

And yes I?d missed or forgotten that BMX use 20inch wheels and have gone
tubeless which probably makes sense.

--
C'est bon
Soloman

Roger Merriman

Maybe, but more commonly the tire leaves the rim, which gets
scuffed/abraded on the pavement.

https://www.reddit.com/r/ebikes/comments/14tlgs9/this_is_what_happens_when_you_have_a_catastrophic/

I have heard of that, some road bike tyres had rumours of sidewall failures
years back for example, but can?t see how a slime or copies ie sealant >>>>> filled tube, can introduce a failure for either wheel or tyre, over
standard tubes. I might be wary of the very cheap TPU as they have plastic
valves etc that to be vaguely on topic don?t like being heated up from >>>>> being pumped up by an electric pump.

They apparently do get fairly warm.

Roger Merriman

Good point. The goop doesn't _cause_ the tire to demount.

That said, as with the reddit author above, using goop to
avoid replacement of worn/leaking systems can exacerbate the
likelihood of failure on the road. Or offroad, as the case
may be.

"also got sprayed by slime. All because I was a cheapskate
and wanted to wear down the old tire before buying new ones.
Now I bought two new tires and a new rear wheel. "

Indeed never underestimate human ability to make poor choices! Encountered >>> someone who had dislocated his shoulder yesterday after trying to ride some >>> of the very technical trails (was a bank holiday) on a 30+ year old
specialised yes it was full suspension but it was utterly unsuitable for >>> such trails! Got him in the sling and so on.

Roger Merriman

Making poor choices is a learning experience. Better than simply being
told what to do.

Ish Pitch hill has with a few exceptions very technical trails off the
steep slopes, this isnAt the place to just have a go! If heAd need to be
very talented rider to overcome the older design.

Ie was fairly inevitable, absolutely is fun to see how far can push stuff, >hence I cooked the rotor on the Gravel bike, sometimes is fun to push it.

But modern trails and bikes have advanced hugely so this sort of thing is
way beyond what the bike was designed for.

--
C'est bon
Soloman

Roger Merriman

My life has been a long series of "just have a go" experiences. So
far, so good.

--
C'est bon
Soloman
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On 8/26/2025 12:17 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 11:58 AM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 11:02 AM, Roger Merriman wrote:

Catrike Ryder <Soloman@old.bikers.org> wrote:

On Tue, 26 Aug 2025 08:47:10 -0500, AMuzi <am@yellowjersey.org> wrote: >>>>>>

On 8/26/2025 8:03 AM, Catrike Ryder wrote:

On 26 Aug 2025 11:21:05 GMT, Roger Merriman <roger@sarlet.com> wrote: >>>>>>>>

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I
got it the manual didn't say it was set up for schrader valves so since
the parts are all blackit took me a half hour to figure out that I had
to remove the rubber plug and the replace it with the Preta valve
fitting. Then the pump would not turn on though the charge was full.

Finally I stuck a screwdriver in the air exit and this moved the pumping
mechanism slightly and it operated fine after that. >>>>>>>>>>>>>>>
With Silca tubeless sealant and tubeless tires you'd probably only have
to carry this pump on the bike. I'll let you know how that works out.
The Silca sealant is supposed to close 6 mm holes and I never had a
tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable. >>>>>>>>>>>>>>

No somewhat optimistically Silca and others do claim 6mm. >>>>>>>>>>>>>
<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower
pressures, though I?ve found it (tubeless) is fairly reliable with thorn
holes, less so for slashes be that flint or glass.

Hence my roadie commuter has tubes and tyres with protection so I don?t
need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things: >>>>>>>>>>>> https://www.yellowjersey.org/photosfromthepast/cciround.jpg >>>>>>>>>>>> is necessarily big enough to have rent the fabric severely. >>>>>>>>>>>

I'm among the skeptical as well. But I hesitate calling Silca liars so I
will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and >>>>>>>>>> report back.

A slash is more likely to be sealed, than a circular hole which is likely
to have a 100% failure!

I-Ave certainly had thorn and small flint slashes seal, the offending object
is always gone. So a few MM though some way off 6/7mm which is the upper
limit, and has tyre pressure increases it-As even less likely, hence this
works better with MTB tyres.

Roger Merriman

I'll pass. I understand the slime sealants make a mess on the inside >>>>>>>> of your tires.

--
C'est bon
Soloman

under a minute:

https://www.youtube.com/watch?v=2MEXNj-4hVg

https://www.youtube.com/watch?v=N3BPzTXYlKI

This is about 22 minutes but thorough and informative:
https://www.youtube.com/watch?v=lEHwQ2yr84w

I read about a guy eventually trashing a wheel after getting a serious >>>>>> flat with one of the preslimed tubes. I'm not going to go that route. >>>>>

How? By what means? If the tube had a catastrophic failure ie burst you >>>>> could crack the rim. But same goes for any other tube. And takes some >>>>> impact to do so, way beyond what is reasonably expected.

And yes IrCOd missed or forgotten that BMX use 20inch wheels and have gone
tubeless which probably makes sense.

--
C'est bon
Soloman

Roger Merriman

Maybe, but more commonly the tire leaves the rim, which gets
scuffed/abraded on the pavement.

https://www.reddit.com/r/ebikes/comments/14tlgs9/this_is_what_happens_when_you_have_a_catastrophic/

I have heard of that, some road bike tyres had rumours of sidewall failures >>> years back for example, but canrCOt see how a slime or copies ie sealant >>> filled tube, can introduce a failure for either wheel or tyre, over
standard tubes. I might be wary of the very cheap TPU as they have plastic >>> valves etc that to be vaguely on topic donrCOt like being heated up from >>> being pumped up by an electric pump.

They apparently do get fairly warm.

Roger Merriman

Good point. The goop doesn't _cause_ the tire to demount.

That said, as with the reddit author above, using goop to
avoid replacement of worn/leaking systems can exacerbate the
likelihood of failure on the road. Or offroad, as the case
may be.

"also got sprayed by slime. All because I was a cheapskate
and wanted to wear down the old tire before buying new ones.
Now I bought two new tires and a new rear wheel. "

Indeed never underestimate human ability to make poor choices! Encountered someone who had dislocated his shoulder yesterday after trying to ride some of the very technical trails (was a bank holiday) on a 30+ year old specialised yes it was full suspension but it was utterly unsuitable for
such trails! Got him in the sling and so on.

Roger Merriman

In fairness, I've broken bones with perfectly good and
appropriate equipment. More than once.
--
Andrew Muzi
am@yellowjersey.org
Open every day since 1 April, 1971
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On 8/26/2025 12:58 PM, Jeff Liebermann wrote:

On Tue, 26 Aug 2025 07:54:17 -0500, AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 12:00 AM, Jeff Liebermann wrote:

On Mon, 25 Aug 2025 17:58:44 -0500, AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I
got it the manual didn't say it was set up for schrader valves so since
the parts are all blackit took me a half hour to figure out that I had
to remove the rubber plug and the replace it with the Preta valve >>>>>>>>> fitting. Then the pump would not turn on though the charge was full. >>>>>>>>>
Finally I stuck a screwdriver in the air exit and this moved the pumping
mechanism slightly and it operated fine after that.

With Silca tubeless sealant and tubeless tires you'd probably only have
to carry this pump on the bike. I'll let you know how that works out. >>>>>>>>> The Silca sealant is supposed to close 6 mm holes and I never had a >>>>>>>>> tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable.

No somewhat optimistically Silca and others do claim 6mm.

<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower >>>>>>> pressures, though I?ve found it (tubeless) is fairly reliable with thorn
holes, less so for slashes be that flint or glass.

Hence my roadie commuter has tubes and tyres with protection so I don?t >>>>>>> need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things:
https://www.yellowjersey.org/photosfromthepast/cciround.jpg
is necessarily big enough to have rent the fabric severely.

I'm among the skeptical as well. But I hesitate calling Silca liars so I will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and
report back.

This might be useful information for someone living in Tom's
neighborhood.

"how many TIRES does it take to stop a bullet?"
<https://www.youtube.com/watch?v=rX-3SRqdjWw>
He starts off with a .22LR.

When I was younger and dumber, we were shooting at big heavy tractor
tires with .22LR from about 25ft. We were warned that the bullet
might bounce back in our direction. After about 50 rounds, one bullet
broke a window about 50 ft behind us. Oops. After that, the
consensus was that shooting at hard rubber targets was a really bad
idea.

Yes that's right especially for thick truck tires.

True. This was a from some kind of agricultural tractor, about 4ft
diameter. It was big, thick and quite heavy. I don't recall if it
had a wire cord.

Bicycle
tires are a different thing, more like a cardboard target. I
measured the openings in a cardboard box target from 50
feet. They are about 6mm. (point blank would just shred a tire)

The hole size might also depend on the type of bullet. If it was a
variation of a hollow point, it would make a larger diameter hole than
a conventional "round nose" bullet. I couldn't find a .22LR
wadcutter, which would make a clean circular hole. Some examples: "Hollow-point Your Own .22LRs" <https://americanhandgunner.com/gear/beat-the-ammo-shortage/>
"A Comprehensive Guide to Wadcutter Bullets" <https://www.berrysmfg.com/a-comprehensive-guide-to-wadcutter-bullets/>

My suggestion was admittedly tongue in cheek

As are most of my replies and retorts. Note that tongue-and-cheek is
a miniature version of foot-in-mouth.

as piercing a
tire without rim damage is not very likely. Still and all, a
6mm hole in a bicycle tire is a major catastrophic injury.
Moreso for thin fabric high pressure road tires, less so for
low pressure 26x5 and the like.

Looking at a 5mm bolt (I couldn't find a 6mm), riding over something
that produced a hole that size in the tire would be a major
achievement. It's like trying to shoot at a block of ballistic gel to measure penetration. Even a much larger bullet will produce a fairly
small "hole" in the gel[1]. That's because the bullet does not remove
gel material from the hole. A hole in a tire is much the same as the ballistic gel. The rubber expands as the bullet goes through, The
rubber then returns to almost its original shape, leaving only a small
hole. I would guess(tm) that 0.6mm is a more likely hole size.

[1] I'm referring to the entry hole, not the exit hole (if any), and
not the expansion of the bullet path caused by hydraulic pressure. If
you weighed the block of ballistic gel, where the bullet does not exit
the block, the before and after weights will be identical thus
demonstrating that no gel was lost.

"The basics of ballistic gelatin testing" <https://www.norma-ammunition.com/en-gb/norma-academy/dedicated-components/ballistics/the-basics-of-ballistic-gelatin-testing>

Yes that's right for ballistic gel.
I don't shoot hollow points; targets only. But they exist.
They are on the shelf next to that target rounds:

https://www.cci-ammunition.com/rimfire/cci/segmented-hollow-point/6-74.html

As with bicycle tires, every possible permutation is offered
as people vary in their need/taste/budget/application etc:

https://www.cci-ammunition.com/rimfire/shop-by-caliber/22-lr/
--
Andrew Muzi
am@yellowjersey.org
Open every day since 1 April, 1971
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On Mon Aug 25 17:58:44 2025 AMuzi wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I >>>>> got it the manual didn't say it was set up for schrader valves so since >>>>> the parts are all blackit took me a half hour to figure out that I had >>>>> to remove the rubber plug and the replace it with the Preta valve
fitting. Then the pump would not turn on though the charge was full. >>>>>
Finally I stuck a screwdriver in the air exit and this moved the pumping
mechanism slightly and it operated fine after that.

With Silca tubeless sealant and tubeless tires you'd probably only have >>>>> to carry this pump on the bike. I'll let you know how that works out. >>>>> The Silca sealant is supposed to close 6 mm holes and I never had a >>>>> tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable.

No somewhat optimistically Silca and others do claim 6mm.

<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower
pressures, though I?ve found it (tubeless) is fairly reliable with thorn >>> holes, less so for slashes be that flint or glass.

Hence my roadie commuter has tubes and tyres with protection so I don?t >>> need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things:
https://www.yellowjersey.org/photosfromthepast/cciround.jpg
is necessarily big enough to have rent the fabric severely.

I'm among the skeptical as well. But I hesitate calling Silca liars so I will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and
report back.

Andrew is quite correct of the size of a 6 mm hole. But Silca originally had a sealand with carbon fiber filler that wouldn't even go through a Presta valve core. Then they refined it so that you could injuect the sealant through the Presta Valve and they STILL claim it will seal a 6 mm hole.
Like Andrew I am skeptical about 6 mm but most tubeless leaks are less than 2 mm And you normally filled those with a snake or whatever that tubeless repair kit was called. If it can fill those sorts of leaks I would be more than happy,
But, Andrew, I have no intentions of destroying a tire for the the benefit of your skepticism.
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On Tue Aug 26 12:09:39 2025 AMuzi wrote:

On 8/26/2025 11:58 AM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 11:02 AM, Roger Merriman wrote:

Catrike Ryder <Soloman@old.bikers.org> wrote:

On Tue, 26 Aug 2025 08:47:10 -0500, AMuzi <am@yellowjersey.org> wrote: >>>>

On 8/26/2025 8:03 AM, Catrike Ryder wrote:

On 26 Aug 2025 11:21:05 GMT, Roger Merriman <roger@sarlet.com> wrote: >>>>>>

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I
got it the manual didn't say it was set up for schrader valves so since
the parts are all blackit took me a half hour to figure out that I had
to remove the rubber plug and the replace it with the Preta valve
fitting. Then the pump would not turn on though the charge was full.

Finally I stuck a screwdriver in the air exit and this moved the pumping
mechanism slightly and it operated fine after that. >>>>>>>>>>>>>
With Silca tubeless sealant and tubeless tires you'd probably only have
to carry this pump on the bike. I'll let you know how that works out.
The Silca sealant is supposed to close 6 mm holes and I never had a
tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable. >>>>>>>>>>>>

No somewhat optimistically Silca and others do claim 6mm. >>>>>>>>>>>
<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower
pressures, though I?ve found it (tubeless) is fairly reliable with thorn
holes, less so for slashes be that flint or glass.

Hence my roadie commuter has tubes and tyres with protection so I don?t
need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things: >>>>>>>>>> https://www.yellowjersey.org/photosfromthepast/cciround.jpg >>>>>>>>>> is necessarily big enough to have rent the fabric severely. >>>>>>>>>

I'm among the skeptical as well. But I hesitate calling Silca liars so I
will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and
report back.

A slash is more likely to be sealed, than a circular hole which is likely
to have a 100% failure!

I--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On 8/26/2025 1:58 PM, Jeff Liebermann wrote:

On Tue, 26 Aug 2025 07:54:17 -0500, AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 12:00 AM, Jeff Liebermann wrote:

On Mon, 25 Aug 2025 17:58:44 -0500, AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I
got it the manual didn't say it was set up for schrader valves so since
the parts are all blackit took me a half hour to figure out that I had
to remove the rubber plug and the replace it with the Preta valve >>>>>>>>> fitting. Then the pump would not turn on though the charge was full. >>>>>>>>>
Finally I stuck a screwdriver in the air exit and this moved the pumping
mechanism slightly and it operated fine after that.

With Silca tubeless sealant and tubeless tires you'd probably only have
to carry this pump on the bike. I'll let you know how that works out. >>>>>>>>> The Silca sealant is supposed to close 6 mm holes and I never had a >>>>>>>>> tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable.

No somewhat optimistically Silca and others do claim 6mm.

<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower >>>>>>> pressures, though I?ve found it (tubeless) is fairly reliable with thorn
holes, less so for slashes be that flint or glass.

Hence my roadie commuter has tubes and tyres with protection so I don?t >>>>>>> need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things:
https://www.yellowjersey.org/photosfromthepast/cciround.jpg
is necessarily big enough to have rent the fabric severely.

I'm among the skeptical as well. But I hesitate calling Silca liars so I will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and
report back.

This might be useful information for someone living in Tom's
neighborhood.

"how many TIRES does it take to stop a bullet?"
<https://www.youtube.com/watch?v=rX-3SRqdjWw>
He starts off with a .22LR.

When I was younger and dumber, we were shooting at big heavy tractor
tires with .22LR from about 25ft. We were warned that the bullet
might bounce back in our direction. After about 50 rounds, one bullet
broke a window about 50 ft behind us. Oops. After that, the
consensus was that shooting at hard rubber targets was a really bad
idea.

Yes that's right especially for thick truck tires.

True. This was a from some kind of agricultural tractor, about 4ft
diameter. It was big, thick and quite heavy. I don't recall if it
had a wire cord.

Bicycle
tires are a different thing, more like a cardboard target. I
measured the openings in a cardboard box target from 50
feet. They are about 6mm. (point blank would just shred a tire)

The hole size might also depend on the type of bullet. If it was a
variation of a hollow point, it would make a larger diameter hole than
a conventional "round nose" bullet. I couldn't find a .22LR
wadcutter, which would make a clean circular hole. Some examples: "Hollow-point Your Own .22LRs" <https://americanhandgunner.com/gear/beat-the-ammo-shortage/>
"A Comprehensive Guide to Wadcutter Bullets" <https://www.berrysmfg.com/a-comprehensive-guide-to-wadcutter-bullets/>

My suggestion was admittedly tongue in cheek

As are most of my replies and retorts. Note that tongue-and-cheek is
a miniature version of foot-in-mouth.

as piercing a
tire without rim damage is not very likely. Still and all, a
6mm hole in a bicycle tire is a major catastrophic injury.
Moreso for thin fabric high pressure road tires, less so for
low pressure 26x5 and the like.

Looking at a 5mm bolt (I couldn't find a 6mm), riding over something
that produced a hole that size in the tire would be a major
achievement.

on the road thats true, off road hitting something that leaves a 6 mm hole/tear/rip is much more commonplace.

> It's like trying to shoot at a block of ballistic gel to

measure penetration. Even a much larger bullet will produce a fairly
small "hole" in the gel[1]. That's because the bullet does not remove
gel material from the hole. A hole in a tire is much the same as the ballistic gel. The rubber expands as the bullet goes through, The
rubber then returns to almost its original shape, leaving only a small
hole. I would guess(tm) that 0.6mm is a more likely hole size.

[1] I'm referring to the entry hole, not the exit hole (if any), and
not the expansion of the bullet path caused by hydraulic pressure. If
you weighed the block of ballistic gel, where the bullet does not exit
the block, the before and after weights will be identical thus
demonstrating that no gel was lost.

"The basics of ballistic gelatin testing" <https://www.norma-ammunition.com/en-gb/norma-academy/dedicated-components/ballistics/the-basics-of-ballistic-gelatin-testing>

.
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 12:17 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 11:58 AM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 11:02 AM, Roger Merriman wrote:

Catrike Ryder <Soloman@old.bikers.org> wrote:

On Tue, 26 Aug 2025 08:47:10 -0500, AMuzi <am@yellowjersey.org> wrote: >>>>>>>

On 8/26/2025 8:03 AM, Catrike Ryder wrote:

On 26 Aug 2025 11:21:05 GMT, Roger Merriman <roger@sarlet.com> wrote: >>>>>>>>>

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I
got it the manual didn't say it was set up for schrader valves so since
the parts are all blackit took me a half hour to figure out that I had
to remove the rubber plug and the replace it with the Preta valve
fitting. Then the pump would not turn on though the charge was full.

Finally I stuck a screwdriver in the air exit and this moved the pumping
mechanism slightly and it operated fine after that. >>>>>>>>>>>>>>>>
With Silca tubeless sealant and tubeless tires you'd probably only have
to carry this pump on the bike. I'll let you know how that works out.
The Silca sealant is supposed to close 6 mm holes and I never had a
tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable. >>>>>>>>>>>>>>>

No somewhat optimistically Silca and others do claim 6mm. >>>>>>>>>>>>>>
<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower
pressures, though I?ve found it (tubeless) is fairly reliable with thorn
holes, less so for slashes be that flint or glass. >>>>>>>>>>>>>>
Hence my roadie commuter has tubes and tyres with protection so I don?t
need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things: >>>>>>>>>>>>> https://www.yellowjersey.org/photosfromthepast/cciround.jpg >>>>>>>>>>>>> is necessarily big enough to have rent the fabric severely. >>>>>>>>>>>>

I'm among the skeptical as well. But I hesitate calling Silca liars so I
will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and >>>>>>>>>>> report back.

A slash is more likely to be sealed, than a circular hole which is likely
to have a 100% failure!

I-Ave certainly had thorn and small flint slashes seal, the offending object
is always gone. So a few MM though some way off 6/7mm which is the upper
limit, and has tyre pressure increases it-As even less likely, hence this
works better with MTB tyres.

Roger Merriman

I'll pass. I understand the slime sealants make a mess on the inside >>>>>>>>> of your tires.

--
C'est bon
Soloman

under a minute:

https://www.youtube.com/watch?v=2MEXNj-4hVg

https://www.youtube.com/watch?v=N3BPzTXYlKI

This is about 22 minutes but thorough and informative:
https://www.youtube.com/watch?v=lEHwQ2yr84w

I read about a guy eventually trashing a wheel after getting a serious >>>>>>> flat with one of the preslimed tubes. I'm not going to go that route. >>>>>>

How? By what means? If the tube had a catastrophic failure ie burst you >>>>>> could crack the rim. But same goes for any other tube. And takes some >>>>>> impact to do so, way beyond what is reasonably expected.

And yes IrCOd missed or forgotten that BMX use 20inch wheels and have gone
tubeless which probably makes sense.

--
C'est bon
Soloman

Roger Merriman

Maybe, but more commonly the tire leaves the rim, which gets
scuffed/abraded on the pavement.

https://www.reddit.com/r/ebikes/comments/14tlgs9/this_is_what_happens_when_you_have_a_catastrophic/

I have heard of that, some road bike tyres had rumours of sidewall failures
years back for example, but canrCOt see how a slime or copies ie sealant >>>> filled tube, can introduce a failure for either wheel or tyre, over
standard tubes. I might be wary of the very cheap TPU as they have plastic >>>> valves etc that to be vaguely on topic donrCOt like being heated up from >>>> being pumped up by an electric pump.

They apparently do get fairly warm.

Roger Merriman

Good point. The goop doesn't _cause_ the tire to demount.

That said, as with the reddit author above, using goop to
avoid replacement of worn/leaking systems can exacerbate the
likelihood of failure on the road. Or offroad, as the case
may be.

"also got sprayed by slime. All because I was a cheapskate
and wanted to wear down the old tire before buying new ones.
Now I bought two new tires and a new rear wheel. "

Indeed never underestimate human ability to make poor choices! Encountered >> someone who had dislocated his shoulder yesterday after trying to ride some >> of the very technical trails (was a bank holiday) on a 30+ year old
specialised yes it was full suspension but it was utterly unsuitable for
such trails! Got him in the sling and so on.

Roger Merriman

In fairness, I've broken bones with perfectly good and
appropriate equipment. More than once.

Oh on a bank holiday IrCOd imagine be a few folks with broken bones, but
unless his name was Steve Peat the chances of riding it on such a old
machine is so low, as modern bikes are so much more capable, though that
area has plenty I swerve as IrCOm not prepared for that level of risk and commitment.

Older MTB even with suspension where essentially just more burly road
frames, they hadnrCOt started to design specifically for MTBing as such.

And indeed in Peaties day bikes lasted one run if that! Where as modern
bikes you can do nearly infinite number of DH runs the rider will fatigue before the bike.

Essentially attempting to ride such trails on such a bike had such a predictable outcome, we rode plenty that was arguably beyond the bikes
limits but wasnrCOt that far might of needed to put a foot down or stall etc, but 30 years is a long time in MTB tech, and these trails need folks that
have built up to it, and bikes that are designed for it, so huge amount of travel, slack geometry and space to get over the rear wheel and so on.

Roger Merriman

--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On Tue, 26 Aug 2025 16:31:03 -0400, zen cycle
<funkmasterxx@hotmail.com> wrote:

on the road thats true, off road hitting something that leaves a 6 mm >hole/tear/rip is much more commonplace.

Silca claims a 6mm puncture and not a 6mm tear, rip, gash, slash,
slice, rupture, etc. <https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>
Under specifications Silca says "Seals 6mm+ punctures".

In my never humble opinion, the question is so much about the size of
puncture that can be repaired using Silca sealant, but rather whether
sealant is suitable for fixing any size puncture. If sealant was
suitable, people would also be using sealant to seal inner tubes
instead of patch, rubber cement (glue) and/or cold vulcanizing fluid.

"Small puncture would not seal" <https://www.mtbr.com/threads/small-puncture-would-not-seal.1222184/>

"It looks like a very thin cut ~3mm long. It would sometimes seal when
the wheel gets soft, but when I pump it above 2 bar, it breaks through
like a champaign cork, some liquid squirts out, and the air starts
leaking quite loudly."

"In my experience sealant won't fix a 3mm cut, so that's normal.
Always carry a plug tool, some bacon strips and a pump."

"Sealant rarely fixes 3mm punctures well enough to ride. I can't tell
you how many times I've watched sealant do its job then fail when
pumped up to a ridable PSI, or more often, fail when the casing
flexes."

"Sealant is overrated. Good for tiny thorn holes and not much more.
Sometimes not even. Carry plugs. To permanently fix the tire you
mentioned, patch it from the inside like you'd fix a tube. I've found
plug repairs to be temporary."

The consensus seems to indicate that a 3mm puncture is not a small
hole and suggest using a plug for repair.
--
Jeff Liebermann jeffl@cruzio.com
PO Box 272 http://www.LearnByDestroying.com
Ben Lomond CA 95005-0272
Skype: JeffLiebermann AE6KS 831-336-2558
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

Jeff Liebermann <jeffl@cruzio.com> wrote:

On Tue, 26 Aug 2025 16:31:03 -0400, zen cycle
<funkmasterxx@hotmail.com> wrote:

on the road thats true, off road hitting something that leaves a 6 mm
hole/tear/rip is much more commonplace.

Silca claims a 6mm puncture and not a 6mm tear, rip, gash, slash,
slice, rupture, etc. <https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>
Under specifications Silca says "Seals 6mm+ punctures".

In my never humble opinion, the question is so much about the size of puncture that can be repaired using Silca sealant, but rather whether
sealant is suitable for fixing any size puncture. If sealant was
suitable, people would also be using sealant to seal inner tubes
instead of patch, rubber cement (glue) and/or cold vulcanizing fluid.

"Small puncture would not seal" <https://www.mtbr.com/threads/small-puncture-would-not-seal.1222184/>

"It looks like a very thin cut ~3mm long. It would sometimes seal when
the wheel gets soft, but when I pump it above 2 bar, it breaks through
like a champaign cork, some liquid squirts out, and the air starts
leaking quite loudly."

"In my experience sealant won't fix a 3mm cut, so that's normal.
Always carry a plug tool, some bacon strips and a pump."

"Sealant rarely fixes 3mm punctures well enough to ride. I can't tell
you how many times I've watched sealant do its job then fail when
pumped up to a ridable PSI, or more often, fail when the casing
flexes."

"Sealant is overrated. Good for tiny thorn holes and not much more.
Sometimes not even. Carry plugs. To permanently fix the tire you
mentioned, patch it from the inside like you'd fix a tube. I've found
plug repairs to be temporary."

The consensus seems to indicate that a 3mm puncture is not a small
hole and suggest using a plug for repair.

IrCOd agree 3mm is a larger size, this said they do seem a rather pessimistic lot, in my experience MTB feel tubless is generally a game changer, though
are absolutely folks who do run tubes, myself included.

I would say that a slash is a normal expected shape for a puncture
essentially for MTB bar thorns, yourCOre going to get slashes from flint and
so on.

Hence all but XC tyres are fairly well armoured against such stuff! XC
tyres are paper thin hence use on Gravel bikes.

Roger Merriman


--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On 26 Aug 2025 18:02:31 GMT, Roger Merriman <roger@sarlet.com> wrote:

Catrike Ryder <Soloman@old.bikers.org> wrote:

On 26 Aug 2025 16:02:11 GMT, Roger Merriman <roger@sarlet.com> wrote:

Catrike Ryder <Soloman@old.bikers.org> wrote:

On Tue, 26 Aug 2025 08:47:10 -0500, AMuzi <am@yellowjersey.org> wrote: >>>>

On 8/26/2025 8:03 AM, Catrike Ryder wrote:

On 26 Aug 2025 11:21:05 GMT, Roger Merriman <roger@sarlet.com> wrote: >>>>>>

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I
got it the manual didn't say it was set up for schrader valves so since
the parts are all blackit took me a half hour to figure out that I had
to remove the rubber plug and the replace it with the Preta valve >>>>>>>>>>>>> fitting. Then the pump would not turn on though the charge was full.

Finally I stuck a screwdriver in the air exit and this moved the pumping
mechanism slightly and it operated fine after that.

With Silca tubeless sealant and tubeless tires you'd probably only have
to carry this pump on the bike. I'll let you know how that works out.
The Silca sealant is supposed to close 6 mm holes and I never had a
tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable.

No somewhat optimistically Silca and others do claim 6mm. >>>>>>>>>>>
<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower >>>>>>>>>>> pressures, though I?ve found it (tubeless) is fairly reliable with thorn
holes, less so for slashes be that flint or glass.

Hence my roadie commuter has tubes and tyres with protection so I don?t
need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things:
https://www.yellowjersey.org/photosfromthepast/cciround.jpg >>>>>>>>>> is necessarily big enough to have rent the fabric severely. >>>>>>>>>

I'm among the skeptical as well. But I hesitate calling Silca liars so I
will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and
report back.

A slash is more likely to be sealed, than a circular hole which is likely
to have a 100% failure!

I?ve certainly had thorn and small flint slashes seal, the offending object
is always gone. So a few MM though some way off 6/7mm which is the upper
limit, and has tyre pressure increases it?s even less likely, hence this
works better with MTB tyres.

Roger Merriman

I'll pass. I understand the slime sealants make a mess on the inside >>>>>> of your tires.

--
C'est bon
Soloman

under a minute:

https://www.youtube.com/watch?v=2MEXNj-4hVg

https://www.youtube.com/watch?v=N3BPzTXYlKI

This is about 22 minutes but thorough and informative:
https://www.youtube.com/watch?v=lEHwQ2yr84w

I read about a guy eventually trashing a wheel after getting a serious >>>> flat with one of the preslimed tubes. I'm not going to go that route.

How? By what means? If the tube had a catastrophic failure ie burst you
could crack the rim. But same goes for any other tube. And takes some
impact to do so, way beyond what is reasonably expected.

And yes I?d missed or forgotten that BMX use 20inch wheels and have gone >>> tubeless which probably makes sense.

--
C'est bon
Soloman

Roger Merriman

He trashed the wheel because it was coated with goop.

ItAs going to eat a rim or even a tyre sidewall, itAs not even Dot fluid >level of nastiness itAs fairly benign stuff, it doesnAt wash out of clothes >and donAt think it should go into drains but it certainly has no effect on >wheels or tyres.

There are several fairly high quality small fold-up bikes that use 20
inch wheels, too.

https://bikefriday.com/

Yes and few others but they are extremely rare I see a Molton bike or two >most summers as itAs that sort of area, but they are rare.

--
C'est bon
Soloman

Roger Merriman

Theoretically, I could build a full set of tubless wheels and tires
for my Catrike, although I'm not interested in doing it. I'm very
happy using Schwalbe Marathon Green Guard tires.

--
C'est bon
Soloman
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On 8/26/2025 4:17 PM, Jeff Liebermann wrote:

On Tue, 26 Aug 2025 16:31:03 -0400, zen cycle
<funkmasterxx@hotmail.com> wrote:

on the road thats true, off road hitting something that leaves a 6 mm
hole/tear/rip is much more commonplace.

Silca claims a 6mm puncture and not a 6mm tear, rip, gash, slash,
slice, rupture, etc. <https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>
Under specifications Silca says "Seals 6mm+ punctures".

In my never humble opinion, the question is so much about the size of puncture that can be repaired using Silca sealant, but rather whether
sealant is suitable for fixing any size puncture. If sealant was
suitable, people would also be using sealant to seal inner tubes
instead of patch, rubber cement (glue) and/or cold vulcanizing fluid.

"Small puncture would not seal" <https://www.mtbr.com/threads/small-puncture-would-not-seal.1222184/>

"It looks like a very thin cut ~3mm long. It would sometimes seal when
the wheel gets soft, but when I pump it above 2 bar, it breaks through
like a champaign cork, some liquid squirts out, and the air starts
leaking quite loudly."

"In my experience sealant won't fix a 3mm cut, so that's normal.
Always carry a plug tool, some bacon strips and a pump."

"Sealant rarely fixes 3mm punctures well enough to ride. I can't tell
you how many times I've watched sealant do its job then fail when
pumped up to a ridable PSI, or more often, fail when the casing
flexes."

"Sealant is overrated. Good for tiny thorn holes and not much more.
Sometimes not even. Carry plugs. To permanently fix the tire you
mentioned, patch it from the inside like you'd fix a tube. I've found
plug repairs to be temporary."

The consensus seems to indicate that a 3mm puncture is not a small
hole and suggest using a plug for repair.

Good overview. Where tire fabric is rent, sealant is not
sufficient and even a boot is at best temporary. The fabric
will continue to degrade until failure, whether shortly or
immediately. IME, generally 2mm is not significant but 3mm is.

That said, it has a place. When we first sold latex sealer
(Tufo) I picked up a poster staple (~0.5x1.5mm) in a new
tubular and tried the emulsion. Worked perfectly well for
about two years of commuting.
--
Andrew Muzi
am@yellowjersey.org
Open every day since 1 April, 1971
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On Tue, 26 Aug 2025 12:09:39 -0500, AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 11:58 AM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 11:02 AM, Roger Merriman wrote:

Catrike Ryder <Soloman@old.bikers.org> wrote:

On Tue, 26 Aug 2025 08:47:10 -0500, AMuzi <am@yellowjersey.org> wrote: >>>>>

On 8/26/2025 8:03 AM, Catrike Ryder wrote:

On 26 Aug 2025 11:21:05 GMT, Roger Merriman <roger@sarlet.com> wrote: >>>>>>>

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I
got it the manual didn't say it was set up for schrader valves so since
the parts are all blackit took me a half hour to figure out that I had
to remove the rubber plug and the replace it with the Preta valve
fitting. Then the pump would not turn on though the charge was full.

Finally I stuck a screwdriver in the air exit and this moved the pumping
mechanism slightly and it operated fine after that. >>>>>>>>>>>>>>
With Silca tubeless sealant and tubeless tires you'd probably only have
to carry this pump on the bike. I'll let you know how that works out.
The Silca sealant is supposed to close 6 mm holes and I never had a
tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable. >>>>>>>>>>>>>

No somewhat optimistically Silca and others do claim 6mm. >>>>>>>>>>>>
<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower
pressures, though I?ve found it (tubeless) is fairly reliable with thorn
holes, less so for slashes be that flint or glass.

Hence my roadie commuter has tubes and tyres with protection so I don?t
need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things: >>>>>>>>>>> https://www.yellowjersey.org/photosfromthepast/cciround.jpg >>>>>>>>>>> is necessarily big enough to have rent the fabric severely. >>>>>>>>>>

I'm among the skeptical as well. But I hesitate calling Silca liars so I
will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and
report back.

A slash is more likely to be sealed, than a circular hole which is likely
to have a 100% failure!

I?ve certainly had thorn and small flint slashes seal, the offending object
is always gone. So a few MM though some way off 6/7mm which is the upper
limit, and has tyre pressure increases it?s even less likely, hence this
works better with MTB tyres.

Roger Merriman

I'll pass. I understand the slime sealants make a mess on the inside >>>>>>> of your tires.

--
C'est bon
Soloman

under a minute:

https://www.youtube.com/watch?v=2MEXNj-4hVg

https://www.youtube.com/watch?v=N3BPzTXYlKI

This is about 22 minutes but thorough and informative:
https://www.youtube.com/watch?v=lEHwQ2yr84w

I read about a guy eventually trashing a wheel after getting a serious >>>>> flat with one of the preslimed tubes. I'm not going to go that route. >>>>

How? By what means? If the tube had a catastrophic failure ie burst you >>>> could crack the rim. But same goes for any other tube. And takes some
impact to do so, way beyond what is reasonably expected.

And yes IAd missed or forgotten that BMX use 20inch wheels and have gone >>>> tubeless which probably makes sense.

--
C'est bon
Soloman

Roger Merriman

Maybe, but more commonly the tire leaves the rim, which gets
scuffed/abraded on the pavement.

https://www.reddit.com/r/ebikes/comments/14tlgs9/this_is_what_happens_when_you_have_a_catastrophic/

I have heard of that, some road bike tyres had rumours of sidewall failures >> years back for example, but canAt see how a slime or copies ie sealant
filled tube, can introduce a failure for either wheel or tyre, over
standard tubes. I might be wary of the very cheap TPU as they have plastic >> valves etc that to be vaguely on topic donAt like being heated up from
being pumped up by an electric pump.

They apparently do get fairly warm.

Roger Merriman

Good point. The goop doesn't _cause_ the tire to demount.

That said, as with the reddit author above, using goop to
avoid replacement of worn/leaking systems can exacerbate the
likelihood of failure on the road. Or offroad, as the case
may be.

"also got sprayed by slime. All because I was a cheapskate
and wanted to wear down the old tire before buying new ones.
Now I bought two new tires and a new rear wheel.

But in general are "flats" really a problem in the cycle world,
today? I don't remember that they were during by biking days. I
carried a couple of spare tubes and an inflator in an under seat
holder and I remember using the second tube very, very, rarely. Once
or twice in years...
--
cheers,

John B.

--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On Tue, 26 Aug 2025 17:49:53 -0500, AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 4:17 PM, Jeff Liebermann wrote:

On Tue, 26 Aug 2025 16:31:03 -0400, zen cycle
<funkmasterxx@hotmail.com> wrote:

on the road thats true, off road hitting something that leaves a 6 mm
hole/tear/rip is much more commonplace.

Silca claims a 6mm puncture and not a 6mm tear, rip, gash, slash,
slice, rupture, etc.
<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>
Under specifications Silca says "Seals 6mm+ punctures".

In my never humble opinion, the question is so much about the size of
puncture that can be repaired using Silca sealant, but rather whether
sealant is suitable for fixing any size puncture. If sealant was
suitable, people would also be using sealant to seal inner tubes
instead of patch, rubber cement (glue) and/or cold vulcanizing fluid.

"Small puncture would not seal"
<https://www.mtbr.com/threads/small-puncture-would-not-seal.1222184/>

"It looks like a very thin cut ~3mm long. It would sometimes seal when
the wheel gets soft, but when I pump it above 2 bar, it breaks through
like a champaign cork, some liquid squirts out, and the air starts
leaking quite loudly."

"In my experience sealant won't fix a 3mm cut, so that's normal.
Always carry a plug tool, some bacon strips and a pump."

"Sealant rarely fixes 3mm punctures well enough to ride. I can't tell
you how many times I've watched sealant do its job then fail when
pumped up to a ridable PSI, or more often, fail when the casing
flexes."

"Sealant is overrated. Good for tiny thorn holes and not much more.
Sometimes not even. Carry plugs. To permanently fix the tire you
mentioned, patch it from the inside like you'd fix a tube. I've found
plug repairs to be temporary."

The consensus seems to indicate that a 3mm puncture is not a small
hole and suggest using a plug for repair.

Good overview. Where tire fabric is rent, sealant is not
sufficient and even a boot is at best temporary. The fabric
will continue to degrade until failure, whether shortly or
immediately. IME, generally 2mm is not significant but 3mm is.

That said, it has a place. When we first sold latex sealer
(Tufo) I picked up a poster staple (~0.5x1.5mm) in a new
tubular and tried the emulsion. Worked perfectly well for
about two years of commuting.

A couple of years back I picked up a piece of metal that cut the tread
but did not cut through to the fabric. The tire never went flat, but I
noticed an annoying lump every rotation. I tried and tried to close
that wound, but eventually tossed the tire.

--
C'est bon
Soloman
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On Tue, 26 Aug 2025 17:49:53 -0500, AMuzi <am@yellowjersey.org> wrote:

Good overview. Where tire fabric is rent, sealant is not
sufficient and even a boot is at best temporary. The fabric
will continue to degrade until failure, whether shortly or
immediately. IME, generally 2mm is not significant but 3mm is.

It might be difficult to see any damage inside a 0.6mm, 3mm, or 6mm
dia hole. I agree that the repair potential is highly dependent on
the shape, condition, and extent of the puncture, as well as the
diameter.

That said, it has a place. When we first sold latex sealer
(Tufo) I picked up a poster staple (~0.5x1.5mm) in a new
tubular and tried the emulsion. Worked perfectly well for
about two years of commuting.

I've never seen a poster staple and couldn't find anything with Google
search. Links to some photos would be helpful.

I just wasted some time looking at do-it-thyself formulas for making
the sealant emulsion. However, since I don't ride on tubeless tires
and not having ridden in many years, I won't try to make some. <https://www.google.com/search?q=how%20to%20make%20lubeless%20bicycle%20tire%20sealant&udm=14>
Most of the ingredients are commonly available in diluted form.
Unfortunately, the magic recipes do not disclose the dilution used to
make the sealant.

In my part of the deep dark woods, we grow roofing nails: <https://www.google.com/search?q=roofing%20nails&udm=2>
The large diameter head makes them ideal for deflating tires. The
head is usually quite thin, making the nail design idea for puncturing
the tire, leaking some air, grinding down the head, and then having
the remaining shank embed itself in the tread, and disappear into the
tread. This remained a problem until a neighbor bought a rolling
magnetic sweeper[1]: <https://www.homedepot.com/p/NEIKO-36-in-Rolling-Magnet-Sweeper-with-Wheels-55-lbs-Capacity-Adjustable-Handle-and-Floor-Magnetic-Pick-Up-53418A/328111065>
The bad news is that it doesn't work with aluminum or pure copper
roofing nails.


[1] The neighbor also walked the sweeper down State Hwy 9, which has
soft shoulders. I don't have photos or a clue how far he walked. He
did find enough metal junk in what passes for a bicycle lane to fill a
10 gallon bucket.
--
Jeff Liebermann jeffl@cruzio.com
PO Box 272 http://www.LearnByDestroying.com
Ben Lomond CA 95005-0272
Skype: JeffLiebermann AE6KS 831-336-2558
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On Tue, 26 Aug 2025 16:44:00 -0700, John B.
<jbslocomb@fictitious.site> wrote:

But in general are "flats" really a problem in the cycle world,
today? I don't remember that they were during by biking days. I
carried a couple of spare tubes and an inflator in an under seat
holder and I remember using the second tube very, very, rarely. Once
or twice in years...

The way it works is, if you're prepared to fix a flat tire, you won't
have any flat tires. However, if you ride unprepared, you'll have an
endless series of flat tires.
--
Jeff Liebermann jeffl@cruzio.com
PO Box 272 http://www.LearnByDestroying.com
Ben Lomond CA 95005-0272
Skype: JeffLiebermann AE6KS 831-336-2558
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On 8/26/2025 7:11 PM, Jeff Liebermann wrote:

On Tue, 26 Aug 2025 17:49:53 -0500, AMuzi <am@yellowjersey.org> wrote:

Good overview. Where tire fabric is rent, sealant is not
sufficient and even a boot is at best temporary. The fabric
will continue to degrade until failure, whether shortly or
immediately. IME, generally 2mm is not significant but 3mm is.

It might be difficult to see any damage inside a 0.6mm, 3mm, or 6mm
dia hole. I agree that the repair potential is highly dependent on
the shape, condition, and extent of the puncture, as well as the
diameter.

That said, it has a place. When we first sold latex sealer
(Tufo) I picked up a poster staple (~0.5x1.5mm) in a new
tubular and tried the emulsion. Worked perfectly well for
about two years of commuting.

I've never seen a poster staple and couldn't find anything with Google search. Links to some photos would be helpful.

I just wasted some time looking at do-it-thyself formulas for making
the sealant emulsion. However, since I don't ride on tubeless tires
and not having ridden in many years, I won't try to make some. <https://www.google.com/search?q=how%20to%20make%20lubeless%20bicycle%20tire%20sealant&udm=14>
Most of the ingredients are commonly available in diluted form. Unfortunately, the magic recipes do not disclose the dilution used to
make the sealant.

In my part of the deep dark woods, we grow roofing nails: <https://www.google.com/search?q=roofing%20nails&udm=2>
The large diameter head makes them ideal for deflating tires. The
head is usually quite thin, making the nail design idea for puncturing
the tire, leaking some air, grinding down the head, and then having
the remaining shank embed itself in the tread, and disappear into the
tread. This remained a problem until a neighbor bought a rolling
magnetic sweeper[1]: <https://www.homedepot.com/p/NEIKO-36-in-Rolling-Magnet-Sweeper-with-Wheels-55-lbs-Capacity-Adjustable-Handle-and-Floor-Magnetic-Pick-Up-53418A/328111065>
The bad news is that it doesn't work with aluminum or pure copper
roofing nails.

[1] The neighbor also walked the sweeper down State Hwy 9, which has
soft shoulders. I don't have photos or a clue how far he walked. He
did find enough metal junk in what passes for a bicycle lane to fill a
10 gallon bucket.

It's a T-50 staple. In our old neighborhood, every possible
surface was covered in band posters, bar posters, political
posters many layers deep. The guys who offer that service
use a stapler with a 12" wooden hammer handle and move fast.
Posters fallen into the street land pointy side up half the
time...

Latex emulsion is otherwise known as carpet cement (sold in
5 gallon buckets). It's not some magical potion:

https://orangeseal.com/
--
Andrew Muzi
am@yellowjersey.org
Open every day since 1 April, 1971
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On Tue, 26 Aug 2025 19:40:54 -0500, AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 7:11 PM, Jeff Liebermann wrote:

On Tue, 26 Aug 2025 17:49:53 -0500, AMuzi <am@yellowjersey.org> wrote:

Good overview. Where tire fabric is rent, sealant is not
sufficient and even a boot is at best temporary. The fabric
will continue to degrade until failure, whether shortly or
immediately. IME, generally 2mm is not significant but 3mm is.

It might be difficult to see any damage inside a 0.6mm, 3mm, or 6mm
dia hole. I agree that the repair potential is highly dependent on
the shape, condition, and extent of the puncture, as well as the
diameter.

That said, it has a place. When we first sold latex sealer
(Tufo) I picked up a poster staple (~0.5x1.5mm) in a new
tubular and tried the emulsion. Worked perfectly well for
about two years of commuting.

I've never seen a poster staple and couldn't find anything with Google
search. Links to some photos would be helpful.

I just wasted some time looking at do-it-thyself formulas for making
the sealant emulsion. However, since I don't ride on tubeless tires
and not having ridden in many years, I won't try to make some.
<https://www.google.com/search?q=how%20to%20make%20lubeless%20bicycle%20tire%20sealant&udm=14>
Most of the ingredients are commonly available in diluted form.
Unfortunately, the magic recipes do not disclose the dilution used to
make the sealant.

In my part of the deep dark woods, we grow roofing nails:
<https://www.google.com/search?q=roofing%20nails&udm=2>
The large diameter head makes them ideal for deflating tires. The
head is usually quite thin, making the nail design idea for puncturing
the tire, leaking some air, grinding down the head, and then having
the remaining shank embed itself in the tread, and disappear into the
tread. This remained a problem until a neighbor bought a rolling
magnetic sweeper[1]:
<https://www.homedepot.com/p/NEIKO-36-in-Rolling-Magnet-Sweeper-with-Wheels-55-lbs-Capacity-Adjustable-Handle-and-Floor-Magnetic-Pick-Up-53418A/328111065>
The bad news is that it doesn't work with aluminum or pure copper
roofing nails.


[1] The neighbor also walked the sweeper down State Hwy 9, which has
soft shoulders. I don't have photos or a clue how far he walked. He
did find enough metal junk in what passes for a bicycle lane to fill a
10 gallon bucket.

It's a T-50 staple.

Thank you. I used the T-20 for inside phone wire and CAT5 network
cable.
<https://photos.app.goo.gl/nE79HSHN8oaRQfSh9>
From left to right, T-50A, HT-50A, T-2025 and another T-2025. There
should be 2 more buried in my mess, somewhere.

In our old neighborhood, every possible
surface was covered in band posters, bar posters, political
posters many layers deep. The guys who offer that service
use a stapler with a 12" wooden hammer handle and move fast.

That might be a "hammer tacker" similar to the HT-50A in the photo. I
don't recall any models with wooden handles. I used mine for hanging fiberglass insulation under my house. The others were for securing
coaxial, telco and network cables. These days, I prefer hangers with
plastic staples, where I don't have to worry about stapling a hole in
the cable. Something like these: <https://www.homedepot.com/b/Electrical-Electrical-Tools-Wire-Conduit-Tools-Electrical-Staples/Plastic/N-5yc1vZc5l4Z1z0utj8>

Posters fallen into the street land pointy side up half the
time...

Yep. However, I never had that problem. There are very few bulletin
boards where I've lived. We have a few people running around hanging
posters. The county demands that they remove the posters almost
immediately after the event or the culprit receives a hefty fine. I've
noticed that some of the posters now have sequential serial numbers so
the event organizers and/or service company can be sure they have
removed all the posters.

Latex emulsion is otherwise known as carpet cement (sold in
5 gallon buckets). It's not some magical potion:

https://orangeseal.com/

Thanks. I didn't know that. Everything where I don't know the recipe
or how it works, is by definition magic (to me). I'll do some reading
in a few days, after I'm done with a doctors visit and some computer
repair service calls.
--
Jeff Liebermann jeffl@cruzio.com
PO Box 272 http://www.LearnByDestroying.com
Ben Lomond CA 95005-0272
Skype: JeffLiebermann AE6KS 831-336-2558
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On Tue, 26 Aug 2025 17:14:24 -0700, Jeff Liebermann <jeffl@cruzio.com>
wrote:

On Tue, 26 Aug 2025 16:44:00 -0700, John B.
<jbslocomb@fictitious.site> wrote:

But in general are "flats" really a problem in the cycle world,
today? I don't remember that they were during by biking days. I
carried a couple of spare tubes and an inflator in an under seat
holder and I remember using the second tube very, very, rarely. Once
or twice in years...

The way it works is, if you're prepared to fix a flat tire, you won't
have any flat tires. However, if you ride unprepared, you'll have an
endless series of flat tires.

There is more than a little truth in that statement, much of it unsaid
as someone that is prepared to fix a flat likely knows more then a bit
about the vehicle the tire is mounted on. What makes it go and what
makes stop, so to speak, while the unprepared individual may know only
that the thing is called a "bicycle".
--
cheers,

John B.

--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

John B. <jbslocomb@fictitious.site> wrote:

On Tue, 26 Aug 2025 12:09:39 -0500, AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 11:58 AM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 11:02 AM, Roger Merriman wrote:

Catrike Ryder <Soloman@old.bikers.org> wrote:

On Tue, 26 Aug 2025 08:47:10 -0500, AMuzi <am@yellowjersey.org> wrote: >>>>>>

On 8/26/2025 8:03 AM, Catrike Ryder wrote:

On 26 Aug 2025 11:21:05 GMT, Roger Merriman <roger@sarlet.com> wrote: >>>>>>>>

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I
got it the manual didn't say it was set up for schrader valves so since
the parts are all blackit took me a half hour to figure out that I had
to remove the rubber plug and the replace it with the Preta valve
fitting. Then the pump would not turn on though the charge was full.

Finally I stuck a screwdriver in the air exit and this moved the pumping
mechanism slightly and it operated fine after that. >>>>>>>>>>>>>>>
With Silca tubeless sealant and tubeless tires you'd probably only have
to carry this pump on the bike. I'll let you know how that works out.
The Silca sealant is supposed to close 6 mm holes and I never had a
tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable. >>>>>>>>>>>>>>

No somewhat optimistically Silca and others do claim 6mm. >>>>>>>>>>>>>
<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower
pressures, though I?ve found it (tubeless) is fairly reliable with thorn
holes, less so for slashes be that flint or glass.

Hence my roadie commuter has tubes and tyres with protection so I don?t
need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things: >>>>>>>>>>>> https://www.yellowjersey.org/photosfromthepast/cciround.jpg >>>>>>>>>>>> is necessarily big enough to have rent the fabric severely. >>>>>>>>>>>

I'm among the skeptical as well. But I hesitate calling Silca liars so I
will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and >>>>>>>>>> report back.

A slash is more likely to be sealed, than a circular hole which is likely
to have a 100% failure!

I?ve certainly had thorn and small flint slashes seal, the offending object
is always gone. So a few MM though some way off 6/7mm which is the upper
limit, and has tyre pressure increases it?s even less likely, hence this
works better with MTB tyres.

Roger Merriman

I'll pass. I understand the slime sealants make a mess on the inside >>>>>>>> of your tires.

--
C'est bon
Soloman

under a minute:

https://www.youtube.com/watch?v=2MEXNj-4hVg

https://www.youtube.com/watch?v=N3BPzTXYlKI

This is about 22 minutes but thorough and informative:
https://www.youtube.com/watch?v=lEHwQ2yr84w

I read about a guy eventually trashing a wheel after getting a serious >>>>>> flat with one of the preslimed tubes. I'm not going to go that route. >>>>>

How? By what means? If the tube had a catastrophic failure ie burst you >>>>> could crack the rim. But same goes for any other tube. And takes some >>>>> impact to do so, way beyond what is reasonably expected.

And yes I-Ad missed or forgotten that BMX use 20inch wheels and have gone >>>>> tubeless which probably makes sense.

--
C'est bon
Soloman

Roger Merriman

Maybe, but more commonly the tire leaves the rim, which gets
scuffed/abraded on the pavement.

https://www.reddit.com/r/ebikes/comments/14tlgs9/this_is_what_happens_when_you_have_a_catastrophic/

I have heard of that, some road bike tyres had rumours of sidewall failures >>> years back for example, but can-At see how a slime or copies ie sealant
filled tube, can introduce a failure for either wheel or tyre, over
standard tubes. I might be wary of the very cheap TPU as they have plastic >>> valves etc that to be vaguely on topic don-At like being heated up from
being pumped up by an electric pump.

They apparently do get fairly warm.

Roger Merriman

Good point. The goop doesn't _cause_ the tire to demount.

That said, as with the reddit author above, using goop to
avoid replacement of worn/leaking systems can exacerbate the
likelihood of failure on the road. Or offroad, as the case
may be.

"also got sprayed by slime. All because I was a cheapskate
and wanted to wear down the old tire before buying new ones.
Now I bought two new tires and a new rear wheel.

But in general are "flats" really a problem in the cycle world,
today? I don't remember that they were during by biking days. I
carried a couple of spare tubes and an inflator in an under seat
holder and I remember using the second tube very, very, rarely. Once
or twice in years...
--

It also allows for pressure to be lower, as pinching the tube isnrCOt a
thing, and certainly for Gravel etc tyres you can definitely feel the difference which I had been cynical about.

I used to get 1 or 2 punctures on the road bike per year, the Gravel bike entirely possible to do that in a single ride!

I run tyres on the commute that can handle glass will be encountered as I
pass one section. And that will make a hole that is unlikely to be sealed.

Ie it allows lower pressures which can be performance enhancing or not depending on use case.

I canrCOt imagine it making much difference to CatTrike for example.

And for roadies definitely an argument for TPU tubes or just normal tubes
in terms of ease of use vs any performance gains, you do get a small
rolling resistance gain.

cheers,

John B.

Roger Merriman


--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On 27 Aug 2025 05:33:15 GMT, Roger Merriman <roger@sarlet.com> wrote:

John B. <jbslocomb@fictitious.site> wrote:

On Tue, 26 Aug 2025 12:09:39 -0500, AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 11:58 AM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 11:02 AM, Roger Merriman wrote:

Catrike Ryder <Soloman@old.bikers.org> wrote:

On Tue, 26 Aug 2025 08:47:10 -0500, AMuzi <am@yellowjersey.org> wrote: >>>>>>>

On 8/26/2025 8:03 AM, Catrike Ryder wrote:

On 26 Aug 2025 11:21:05 GMT, Roger Merriman <roger@sarlet.com> wrote: >>>>>>>>>

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I
got it the manual didn't say it was set up for schrader valves so since
the parts are all blackit took me a half hour to figure out that I had
to remove the rubber plug and the replace it with the Preta valve
fitting. Then the pump would not turn on though the charge was full.

Finally I stuck a screwdriver in the air exit and this moved the pumping
mechanism slightly and it operated fine after that. >>>>>>>>>>>>>>>>
With Silca tubeless sealant and tubeless tires you'd probably only have
to carry this pump on the bike. I'll let you know how that works out.
The Silca sealant is supposed to close 6 mm holes and I never had a
tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable. >>>>>>>>>>>>>>>

No somewhat optimistically Silca and others do claim 6mm. >>>>>>>>>>>>>>
<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower
pressures, though I?ve found it (tubeless) is fairly reliable with thorn
holes, less so for slashes be that flint or glass. >>>>>>>>>>>>>>
Hence my roadie commuter has tubes and tyres with protection so I don?t
need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things: >>>>>>>>>>>>> https://www.yellowjersey.org/photosfromthepast/cciround.jpg >>>>>>>>>>>>> is necessarily big enough to have rent the fabric severely. >>>>>>>>>>>>

I'm among the skeptical as well. But I hesitate calling Silca liars so I
will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and >>>>>>>>>>> report back.

A slash is more likely to be sealed, than a circular hole which is likely
to have a 100% failure!

I?ve certainly had thorn and small flint slashes seal, the offending object
is always gone. So a few MM though some way off 6/7mm which is the upper
limit, and has tyre pressure increases it?s even less likely, hence this
works better with MTB tyres.

Roger Merriman

I'll pass. I understand the slime sealants make a mess on the inside >>>>>>>>> of your tires.

--
C'est bon
Soloman

under a minute:

https://www.youtube.com/watch?v=2MEXNj-4hVg

https://www.youtube.com/watch?v=N3BPzTXYlKI

This is about 22 minutes but thorough and informative:
https://www.youtube.com/watch?v=lEHwQ2yr84w

I read about a guy eventually trashing a wheel after getting a serious >>>>>>> flat with one of the preslimed tubes. I'm not going to go that route. >>>>>>

How? By what means? If the tube had a catastrophic failure ie burst you >>>>>> could crack the rim. But same goes for any other tube. And takes some >>>>>> impact to do so, way beyond what is reasonably expected.

And yes I?d missed or forgotten that BMX use 20inch wheels and have gone >>>>>> tubeless which probably makes sense.

--
C'est bon
Soloman

Roger Merriman

Maybe, but more commonly the tire leaves the rim, which gets
scuffed/abraded on the pavement.

https://www.reddit.com/r/ebikes/comments/14tlgs9/this_is_what_happens_when_you_have_a_catastrophic/

I have heard of that, some road bike tyres had rumours of sidewall failures
years back for example, but can?t see how a slime or copies ie sealant >>>> filled tube, can introduce a failure for either wheel or tyre, over
standard tubes. I might be wary of the very cheap TPU as they have plastic >>>> valves etc that to be vaguely on topic don?t like being heated up from >>>> being pumped up by an electric pump.

They apparently do get fairly warm.

Roger Merriman

Good point. The goop doesn't _cause_ the tire to demount.

That said, as with the reddit author above, using goop to
avoid replacement of worn/leaking systems can exacerbate the
likelihood of failure on the road. Or offroad, as the case
may be.

"also got sprayed by slime. All because I was a cheapskate
and wanted to wear down the old tire before buying new ones.
Now I bought two new tires and a new rear wheel.

But in general are "flats" really a problem in the cycle world,
today? I don't remember that they were during by biking days. I
carried a couple of spare tubes and an inflator in an under seat
holder and I remember using the second tube very, very, rarely. Once
or twice in years...
--

It also allows for pressure to be lower, as pinching the tube isnAt a
thing, and certainly for Gravel etc tyres you can definitely feel the >difference which I had been cynical about.

I used to get 1 or 2 punctures on the road bike per year, the Gravel bike >entirely possible to do that in a single ride!

I run tyres on the commute that can handle glass will be encountered as I >pass one section. And that will make a hole that is unlikely to be sealed.

Ie it allows lower pressures which can be performance enhancing or not >depending on use case.

I canAt imagine it making much difference to CatTrike for example.

And for roadies definitely an argument for TPU tubes or just normal tubes
in terms of ease of use vs any performance gains, you do get a small
rolling resistance gain.

cheers,

John B.

Roger Merriman

Not to disagree but I ran "'sew up" tubular tires for many years and
only st0pp4d using them when my Bangkok shop stopped carrying them.
From memory very few flats.
Two spares and two throw a way tire inflators and still room under the
seat (:-)
--
cheers,

John B.

--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On Tue, 26 Aug 2025 21:44:49 -0700, John B.
<jbslocomb@fictitious.site> wrote:

There is more than a little truth in that statement, much of it unsaid
as someone that is prepared to fix a flat likely knows more then a bit
about the vehicle the tire is mounted on. What makes it go and what
makes stop, so to speak, while the unprepared individual may know only
that the thing is called a "bicycle".

I've noticed that with store-bought shirts: if there are a
couple of spare buttons sewn into the hem, the other buttons
are sewn on properly and never fall off.
--
Joy Beeson
joy beeson at centurylink dot net
http://wlweather.net/PAGEJOY/

--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On Tue, 26 Aug 2025 23:13:47 -0700, John B.
<jbslocomb@fictitious.site> wrote:

On 27 Aug 2025 05:33:15 GMT, Roger Merriman <roger@sarlet.com> wrote:

John B. <jbslocomb@fictitious.site> wrote:

On Tue, 26 Aug 2025 12:09:39 -0500, AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 11:58 AM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 11:02 AM, Roger Merriman wrote:

Catrike Ryder <Soloman@old.bikers.org> wrote:

On Tue, 26 Aug 2025 08:47:10 -0500, AMuzi <am@yellowjersey.org> wrote: >>>>>>>>

On 8/26/2025 8:03 AM, Catrike Ryder wrote:

On 26 Aug 2025 11:21:05 GMT, Roger Merriman <roger@sarlet.com> wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I
got it the manual didn't say it was set up for schrader valves so since
the parts are all blackit took me a half hour to figure out that I had
to remove the rubber plug and the replace it with the Preta valve
fitting. Then the pump would not turn on though the charge was full.

Finally I stuck a screwdriver in the air exit and this moved the pumping
mechanism slightly and it operated fine after that. >>>>>>>>>>>>>>>>>
With Silca tubeless sealant and tubeless tires you'd probably only have
to carry this pump on the bike. I'll let you know how that works out.
The Silca sealant is supposed to close 6 mm holes and I never had a
tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable. >>>>>>>>>>>>>>>>

No somewhat optimistically Silca and others do claim 6mm. >>>>>>>>>>>>>>>
<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower
pressures, though I?ve found it (tubeless) is fairly reliable with thorn
holes, less so for slashes be that flint or glass. >>>>>>>>>>>>>>>
Hence my roadie commuter has tubes and tyres with protection so I don?t
need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things: >>>>>>>>>>>>>> https://www.yellowjersey.org/photosfromthepast/cciround.jpg >>>>>>>>>>>>>> is necessarily big enough to have rent the fabric severely. >>>>>>>>>>>>>

I'm among the skeptical as well. But I hesitate calling Silca liars so I
will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and >>>>>>>>>>>> report back.

A slash is more likely to be sealed, than a circular hole which is likely
to have a 100% failure!

I?ve certainly had thorn and small flint slashes seal, the offending object
is always gone. So a few MM though some way off 6/7mm which is the upper
limit, and has tyre pressure increases it?s even less likely, hence this
works better with MTB tyres.

Roger Merriman

I'll pass. I understand the slime sealants make a mess on the inside >>>>>>>>>> of your tires.

--
C'est bon
Soloman

under a minute:

https://www.youtube.com/watch?v=2MEXNj-4hVg

https://www.youtube.com/watch?v=N3BPzTXYlKI

This is about 22 minutes but thorough and informative:
https://www.youtube.com/watch?v=lEHwQ2yr84w

I read about a guy eventually trashing a wheel after getting a serious >>>>>>>> flat with one of the preslimed tubes. I'm not going to go that route. >>>>>>>

How? By what means? If the tube had a catastrophic failure ie burst you >>>>>>> could crack the rim. But same goes for any other tube. And takes some >>>>>>> impact to do so, way beyond what is reasonably expected.

And yes I?d missed or forgotten that BMX use 20inch wheels and have gone
tubeless which probably makes sense.

--
C'est bon
Soloman

Roger Merriman

Maybe, but more commonly the tire leaves the rim, which gets
scuffed/abraded on the pavement.

https://www.reddit.com/r/ebikes/comments/14tlgs9/this_is_what_happens_when_you_have_a_catastrophic/

I have heard of that, some road bike tyres had rumours of sidewall failures
years back for example, but can?t see how a slime or copies ie sealant >>>>> filled tube, can introduce a failure for either wheel or tyre, over
standard tubes. I might be wary of the very cheap TPU as they have plastic
valves etc that to be vaguely on topic don?t like being heated up from >>>>> being pumped up by an electric pump.

They apparently do get fairly warm.

Roger Merriman

Good point. The goop doesn't _cause_ the tire to demount.

That said, as with the reddit author above, using goop to
avoid replacement of worn/leaking systems can exacerbate the
likelihood of failure on the road. Or offroad, as the case
may be.

"also got sprayed by slime. All because I was a cheapskate
and wanted to wear down the old tire before buying new ones.
Now I bought two new tires and a new rear wheel.

But in general are "flats" really a problem in the cycle world,
today? I don't remember that they were during by biking days. I
carried a couple of spare tubes and an inflator in an under seat
holder and I remember using the second tube very, very, rarely. Once
or twice in years...
--

It also allows for pressure to be lower, as pinching the tube isnAt a >>thing, and certainly for Gravel etc tyres you can definitely feel the >>difference which I had been cynical about.

I used to get 1 or 2 punctures on the road bike per year, the Gravel bike >>entirely possible to do that in a single ride!

I run tyres on the commute that can handle glass will be encountered as I >>pass one section. And that will make a hole that is unlikely to be sealed.

Ie it allows lower pressures which can be performance enhancing or not >>depending on use case.

I canAt imagine it making much difference to CatTrike for example.

And for roadies definitely an argument for TPU tubes or just normal tubes >>in terms of ease of use vs any performance gains, you do get a small >>rolling resistance gain.

cheers,

John B.

Roger Merriman

Not to disagree but I ran "'sew up" tubular tires for many years and
only st0pp4d using them when my Bangkok shop stopped carrying them.
From memory very few flats.
Two spares and two throw a way tire inflators and still room under the
seat (:-)

A while back I had a series of flat tires because of bad rim tape.
Other than that, the majority of my few flat tires are due to the tube
failing at the valve stem connection.

--
C'est bon
Soloman
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On 8/26/2025 8:41 PM, Jeff Liebermann wrote:

On Tue, 26 Aug 2025 19:40:54 -0500, AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 7:11 PM, Jeff Liebermann wrote:

On Tue, 26 Aug 2025 17:49:53 -0500, AMuzi <am@yellowjersey.org> wrote:

Good overview. Where tire fabric is rent, sealant is not
sufficient and even a boot is at best temporary. The fabric
will continue to degrade until failure, whether shortly or
immediately. IME, generally 2mm is not significant but 3mm is.

It might be difficult to see any damage inside a 0.6mm, 3mm, or 6mm
dia hole. I agree that the repair potential is highly dependent on
the shape, condition, and extent of the puncture, as well as the
diameter.

That said, it has a place. When we first sold latex sealer
(Tufo) I picked up a poster staple (~0.5x1.5mm) in a new
tubular and tried the emulsion. Worked perfectly well for
about two years of commuting.

I've never seen a poster staple and couldn't find anything with Google
search. Links to some photos would be helpful.

I just wasted some time looking at do-it-thyself formulas for making
the sealant emulsion. However, since I don't ride on tubeless tires
and not having ridden in many years, I won't try to make some.
<https://www.google.com/search?q=how%20to%20make%20lubeless%20bicycle%20tire%20sealant&udm=14>
Most of the ingredients are commonly available in diluted form.
Unfortunately, the magic recipes do not disclose the dilution used to
make the sealant.

In my part of the deep dark woods, we grow roofing nails:
<https://www.google.com/search?q=roofing%20nails&udm=2>
The large diameter head makes them ideal for deflating tires. The
head is usually quite thin, making the nail design idea for puncturing
the tire, leaking some air, grinding down the head, and then having
the remaining shank embed itself in the tread, and disappear into the
tread. This remained a problem until a neighbor bought a rolling
magnetic sweeper[1]:
<https://www.homedepot.com/p/NEIKO-36-in-Rolling-Magnet-Sweeper-with-Wheels-55-lbs-Capacity-Adjustable-Handle-and-Floor-Magnetic-Pick-Up-53418A/328111065>
The bad news is that it doesn't work with aluminum or pure copper
roofing nails.


[1] The neighbor also walked the sweeper down State Hwy 9, which has
soft shoulders. I don't have photos or a clue how far he walked. He
did find enough metal junk in what passes for a bicycle lane to fill a
10 gallon bucket.

It's a T-50 staple.

Thank you. I used the T-20 for inside phone wire and CAT5 network
cable.
<https://photos.app.goo.gl/nE79HSHN8oaRQfSh9>
From left to right, T-50A, HT-50A, T-2025 and another T-2025. There
should be 2 more buried in my mess, somewhere.

In our old neighborhood, every possible
surface was covered in band posters, bar posters, political
posters many layers deep. The guys who offer that service
use a stapler with a 12" wooden hammer handle and move fast.

That might be a "hammer tacker" similar to the HT-50A in the photo. I
don't recall any models with wooden handles. I used mine for hanging fiberglass insulation under my house. The others were for securing
coaxial, telco and network cables. These days, I prefer hangers with
plastic staples, where I don't have to worry about stapling a hole in
the cable. Something like these: <https://www.homedepot.com/b/Electrical-Electrical-Tools-Wire-Conduit-Tools-Electrical-Staples/Plastic/N-5yc1vZc5l4Z1z0utj8>

Posters fallen into the street land pointy side up half the
time...

Yep. However, I never had that problem. There are very few bulletin
boards where I've lived. We have a few people running around hanging posters. The county demands that they remove the posters almost
immediately after the event or the culprit receives a hefty fine. I've noticed that some of the posters now have sequential serial numbers so
the event organizers and/or service company can be sure they have
removed all the posters.

Latex emulsion is otherwise known as carpet cement (sold in
5 gallon buckets). It's not some magical potion:

https://orangeseal.com/

Thanks. I didn't know that. Everything where I don't know the recipe
or how it works, is by definition magic (to me). I'll do some reading
in a few days, after I'm done with a doctors visit and some computer
repair service calls.

MSDS:

https://cdn.shopify.com/s/files/1/0309/9521/files/1530965_SILCA_Tire_Sealant_Safety_Data_Sheet_US.pdf?v=1737724018
--
Andrew Muzi
am@yellowjersey.org
Open every day since 1 April, 1971
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On 8/27/2025 1:13 AM, John B. wrote:

On 27 Aug 2025 05:33:15 GMT, Roger Merriman <roger@sarlet.com> wrote:

John B. <jbslocomb@fictitious.site> wrote:

On Tue, 26 Aug 2025 12:09:39 -0500, AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 11:58 AM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 11:02 AM, Roger Merriman wrote:

Catrike Ryder <Soloman@old.bikers.org> wrote:

On Tue, 26 Aug 2025 08:47:10 -0500, AMuzi <am@yellowjersey.org> wrote: >>>>>>>>

On 8/26/2025 8:03 AM, Catrike Ryder wrote:

On 26 Aug 2025 11:21:05 GMT, Roger Merriman <roger@sarlet.com> wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I
got it the manual didn't say it was set up for schrader valves so since
the parts are all blackit took me a half hour to figure out that I had
to remove the rubber plug and the replace it with the Preta valve
fitting. Then the pump would not turn on though the charge was full.

Finally I stuck a screwdriver in the air exit and this moved the pumping
mechanism slightly and it operated fine after that. >>>>>>>>>>>>>>>>>
With Silca tubeless sealant and tubeless tires you'd probably only have
to carry this pump on the bike. I'll let you know how that works out.
The Silca sealant is supposed to close 6 mm holes and I never had a
tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable. >>>>>>>>>>>>>>>>

No somewhat optimistically Silca and others do claim 6mm. >>>>>>>>>>>>>>>
<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower
pressures, though I?ve found it (tubeless) is fairly reliable with thorn
holes, less so for slashes be that flint or glass. >>>>>>>>>>>>>>>
Hence my roadie commuter has tubes and tyres with protection so I don?t
need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things: >>>>>>>>>>>>>> https://www.yellowjersey.org/photosfromthepast/cciround.jpg >>>>>>>>>>>>>> is necessarily big enough to have rent the fabric severely. >>>>>>>>>>>>>

I'm among the skeptical as well. But I hesitate calling Silca liars so I
will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and >>>>>>>>>>>> report back.

A slash is more likely to be sealed, than a circular hole which is likely
to have a 100% failure!

I?ve certainly had thorn and small flint slashes seal, the offending object
is always gone. So a few MM though some way off 6/7mm which is the upper
limit, and has tyre pressure increases it?s even less likely, hence this
works better with MTB tyres.

Roger Merriman

I'll pass. I understand the slime sealants make a mess on the inside >>>>>>>>>> of your tires.

--
C'est bon
Soloman

under a minute:

https://www.youtube.com/watch?v=2MEXNj-4hVg

https://www.youtube.com/watch?v=N3BPzTXYlKI

This is about 22 minutes but thorough and informative:
https://www.youtube.com/watch?v=lEHwQ2yr84w

I read about a guy eventually trashing a wheel after getting a serious >>>>>>>> flat with one of the preslimed tubes. I'm not going to go that route. >>>>>>>

How? By what means? If the tube had a catastrophic failure ie burst you >>>>>>> could crack the rim. But same goes for any other tube. And takes some >>>>>>> impact to do so, way beyond what is reasonably expected.

And yes I?d missed or forgotten that BMX use 20inch wheels and have gone
tubeless which probably makes sense.

--
C'est bon
Soloman

Roger Merriman

Maybe, but more commonly the tire leaves the rim, which gets
scuffed/abraded on the pavement.

https://www.reddit.com/r/ebikes/comments/14tlgs9/this_is_what_happens_when_you_have_a_catastrophic/

I have heard of that, some road bike tyres had rumours of sidewall failures
years back for example, but can?t see how a slime or copies ie sealant >>>>> filled tube, can introduce a failure for either wheel or tyre, over
standard tubes. I might be wary of the very cheap TPU as they have plastic
valves etc that to be vaguely on topic don?t like being heated up from >>>>> being pumped up by an electric pump.

They apparently do get fairly warm.

Roger Merriman

Good point. The goop doesn't _cause_ the tire to demount.

That said, as with the reddit author above, using goop to
avoid replacement of worn/leaking systems can exacerbate the
likelihood of failure on the road. Or offroad, as the case
may be.

"also got sprayed by slime. All because I was a cheapskate
and wanted to wear down the old tire before buying new ones.
Now I bought two new tires and a new rear wheel.

But in general are "flats" really a problem in the cycle world,
today? I don't remember that they were during by biking days. I
carried a couple of spare tubes and an inflator in an under seat
holder and I remember using the second tube very, very, rarely. Once
or twice in years...
--

It also allows for pressure to be lower, as pinching the tube isnrCOt a
thing, and certainly for Gravel etc tyres you can definitely feel the
difference which I had been cynical about.

I used to get 1 or 2 punctures on the road bike per year, the Gravel bike
entirely possible to do that in a single ride!

I run tyres on the commute that can handle glass will be encountered as I
pass one section. And that will make a hole that is unlikely to be sealed. >>
Ie it allows lower pressures which can be performance enhancing or not
depending on use case.

I canrCOt imagine it making much difference to CatTrike for example.

And for roadies definitely an argument for TPU tubes or just normal tubes
in terms of ease of use vs any performance gains, you do get a small
rolling resistance gain.

cheers,

John B.

Roger Merriman

Not to disagree but I ran "'sew up" tubular tires for many years and
only st0pp4d using them when my Bangkok shop stopped carrying them.
From memory very few flats.
Two spares and two throw a way tire inflators and still room under the
seat (:-)
--
cheers,

John B.

+1
In 55 years of riding tubular tires, including early today,
I have had flats but not inordinately. Just part of life;
not a hardship at all.
--
Andrew Muzi
am@yellowjersey.org
Open every day since 1 April, 1971
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On 8/26/2025 12:51 PM, AMuzi wrote:

On 8/26/2025 11:02 AM, Roger Merriman wrote:

Catrike Ryder <Soloman@old.bikers.org> wrote:

On Tue, 26 Aug 2025 08:47:10 -0500, AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 8:03 AM, Catrike Ryder wrote:

On 26 Aug 2025 11:21:05 GMT, Roger Merriman <roger@sarlet.com> wrote: >>>>>

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi-a wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto
investigate. When I
got it the manual didn't say it was set up for schrader >>>>>>>>>>>> valves so since
the parts are all blackit took me a half hour to figure out >>>>>>>>>>>> that I had
to remove the rubber plug and the replace it with the Preta >>>>>>>>>>>> valve
fitting. Then the pump would not turn on though the charge >>>>>>>>>>>> was full.

Finally I stuck a screwdriver in the air exit and this moved >>>>>>>>>>>> the pumping
mechanism slightly and it operated fine after that.

With Silca tubeless sealant and tubeless tires you'd
probably only have
to carry this pump on the bike. I'll let you know how that >>>>>>>>>>>> works out.
The Silca sealant is supposed to close 6 mm holes and I >>>>>>>>>>>> never had a
tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable.

No somewhat optimistically Silca and others do claim 6mm.

<https://silca.cc/collections/tubeless-collection/products/ >>>>>>>>>> ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at >>>>>>>>>> lower
pressures, though I?ve found it (tubeless) is fairly reliable >>>>>>>>>> with thorn
holes, less so for slashes be that flint or glass.

Hence my roadie commuter has tubes and tyres with protection >>>>>>>>>> so I don?t
need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things:
https://www.yellowjersey.org/photosfromthepast/cciround.jpg
is necessarily big enough to have rent the fabric severely.

I'm among the skeptical as well. But I hesitate calling Silca >>>>>>>> liars so I
will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and
report back.

A slash is more likely to be sealed, than a circular hole which is >>>>>> likely
to have a 100% failure!

I-Ave certainly had thorn and small flint slashes seal, the
offending object
is always gone. So a few MM though some way off 6/7mm which is the >>>>>> upper
limit, and has tyre pressure increases it-As even less likely,
hence this
works better with MTB tyres.

Roger Merriman

I'll pass. I understand the slime sealants make a mess on the inside >>>>> of your tires.

--
C'est bon
Soloman

under a minute:

https://www.youtube.com/watch?v=2MEXNj-4hVg

https://www.youtube.com/watch?v=N3BPzTXYlKI

This is about 22 minutes but thorough and informative:
https://www.youtube.com/watch?v=lEHwQ2yr84w

I read about a guy eventually trashing a wheel after getting a serious
flat with one of the preslimed tubes. I'm not going to go that route.

How? By what means? If the tube had a catastrophic failure ie burst you
could crack the rim. But same goes for any other tube. And takes some
impact to do so, way beyond what is reasonably expected.

And yes IrCOd missed or forgotten that BMX use 20inch wheels and have gone >> tubeless which probably makes sense.

--
C'est bon
Soloman

Roger Merriman

Maybe, but more commonly the tire leaves the rim, which gets scuffed/ abraded on the pavement.

https://www.reddit.com/r/ebikes/comments/14tlgs9/ this_is_what_happens_when_you_have_a_catastrophic/

Which has nothing whatsoever to do with whether the tire/tube had some
sort of sealant in it or not.
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On 8/26/2025 1:17 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 11:58 AM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 11:02 AM, Roger Merriman wrote:

Catrike Ryder <Soloman@old.bikers.org> wrote:

On Tue, 26 Aug 2025 08:47:10 -0500, AMuzi <am@yellowjersey.org> wrote: >>>>>>

On 8/26/2025 8:03 AM, Catrike Ryder wrote:

On 26 Aug 2025 11:21:05 GMT, Roger Merriman <roger@sarlet.com> wrote: >>>>>>>>

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I
got it the manual didn't say it was set up for schrader valves so since
the parts are all blackit took me a half hour to figure out that I had
to remove the rubber plug and the replace it with the Preta valve
fitting. Then the pump would not turn on though the charge was full.

Finally I stuck a screwdriver in the air exit and this moved the pumping
mechanism slightly and it operated fine after that. >>>>>>>>>>>>>>>
With Silca tubeless sealant and tubeless tires you'd probably only have
to carry this pump on the bike. I'll let you know how that works out.
The Silca sealant is supposed to close 6 mm holes and I never had a
tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable. >>>>>>>>>>>>>>

No somewhat optimistically Silca and others do claim 6mm. >>>>>>>>>>>>>
<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower
pressures, though I?ve found it (tubeless) is fairly reliable with thorn
holes, less so for slashes be that flint or glass.

Hence my roadie commuter has tubes and tyres with protection so I don?t
need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things: >>>>>>>>>>>> https://www.yellowjersey.org/photosfromthepast/cciround.jpg >>>>>>>>>>>> is necessarily big enough to have rent the fabric severely. >>>>>>>>>>>

I'm among the skeptical as well. But I hesitate calling Silca liars so I
will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and >>>>>>>>>> report back.

A slash is more likely to be sealed, than a circular hole which is likely
to have a 100% failure!

I-Ave certainly had thorn and small flint slashes seal, the offending object
is always gone. So a few MM though some way off 6/7mm which is the upper
limit, and has tyre pressure increases it-As even less likely, hence this
works better with MTB tyres.

Roger Merriman

I'll pass. I understand the slime sealants make a mess on the inside >>>>>>>> of your tires.

--
C'est bon
Soloman

under a minute:

https://www.youtube.com/watch?v=2MEXNj-4hVg

https://www.youtube.com/watch?v=N3BPzTXYlKI

This is about 22 minutes but thorough and informative:
https://www.youtube.com/watch?v=lEHwQ2yr84w

I read about a guy eventually trashing a wheel after getting a serious >>>>>> flat with one of the preslimed tubes. I'm not going to go that route. >>>>>

How? By what means? If the tube had a catastrophic failure ie burst you >>>>> could crack the rim. But same goes for any other tube. And takes some >>>>> impact to do so, way beyond what is reasonably expected.

And yes IrCOd missed or forgotten that BMX use 20inch wheels and have gone
tubeless which probably makes sense.

--
C'est bon
Soloman

Roger Merriman

Maybe, but more commonly the tire leaves the rim, which gets
scuffed/abraded on the pavement.

https://www.reddit.com/r/ebikes/comments/14tlgs9/this_is_what_happens_when_you_have_a_catastrophic/

I have heard of that, some road bike tyres had rumours of sidewall failures >>> years back for example, but canrCOt see how a slime or copies ie sealant >>> filled tube, can introduce a failure for either wheel or tyre, over
standard tubes. I might be wary of the very cheap TPU as they have plastic >>> valves etc that to be vaguely on topic donrCOt like being heated up from >>> being pumped up by an electric pump.

They apparently do get fairly warm.

Roger Merriman

Good point. The goop doesn't _cause_ the tire to demount.

That said, as with the reddit author above, using goop to
avoid replacement of worn/leaking systems can exacerbate the
likelihood of failure on the road. Or offroad, as the case
may be.

"also got sprayed by slime. All because I was a cheapskate
and wanted to wear down the old tire before buying new ones.
Now I bought two new tires and a new rear wheel. "

Indeed never underestimate human ability to make poor choices!

best words of wisdom ever typed into this forum.... :)


Encountered

someone who had dislocated his shoulder yesterday after trying to ride some of the very technical trails (was a bank holiday) on a 30+ year old specialised yes it was full suspension but it was utterly unsuitable for
such trails! Got him in the sling and so on.

Roger Merriman

--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On 8/27/2025 8:06 AM, zen cycle wrote:

On 8/26/2025 12:51 PM, AMuzi wrote:

On 8/26/2025 11:02 AM, Roger Merriman wrote:

Catrike Ryder <Soloman@old.bikers.org> wrote:

On Tue, 26 Aug 2025 08:47:10 -0500, AMuzi
<am@yellowjersey.org> wrote:

On 8/26/2025 8:03 AM, Catrike Ryder wrote:

On 26 Aug 2025 11:21:05 GMT, Roger Merriman
<roger@sarlet.com> wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi-a wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap
bto investigate. When I
got it the manual didn't say it was set up for
schrader valves so since
the parts are all blackit took me a half hour
to figure out that I had
to remove the rubber plug and the replace it
with the Preta valve
fitting. Then the pump would not turn on though
the charge was full.

Finally I stuck a screwdriver in the air exit
and this moved the pumping
mechanism slightly and it operated fine after
that.

With Silca tubeless sealant and tubeless tires
you'd probably only have
to carry this pump on the bike. I'll let you
know how that works out.
The Silca sealant is supposed to close 6 mm
holes and I never had a
tubeless puncture larger than that.

I assume you meant 0.6mm which is much more
probable.

No somewhat optimistically Silca and others do
claim 6mm.

<https://silca.cc/collections/tubeless-
collection/products/ ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with
larger tyres at lower
pressures, though I?ve found it (tubeless) is
fairly reliable with thorn
holes, less so for slashes be that flint or glass.

Hence my roadie commuter has tubes and tyres with
protection so I don?t
need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm
things:
https://www.yellowjersey.org/photosfromthepast/
cciround.jpg
is necessarily big enough to have rent the fabric
severely.

I'm among the skeptical as well. But I hesitate
calling Silca liars so I
will try it and see.

Please fill a tire with Silca goop, shoot it with
a .22 and
report back.

A slash is more likely to be sealed, than a circular
hole which is likely
to have a 100% failure!

I-Ave certainly had thorn and small flint slashes
seal, the offending object
is always gone. So a few MM though some way off 6/7mm
which is the upper
limit, and has tyre pressure increases it-As even less
likely, hence this
works better with MTB tyres.

Roger Merriman

I'll pass. I understand the slime sealants make a mess
on the inside
of your tires.

--
C'est bon
Soloman

under a minute:

https://www.youtube.com/watch?v=2MEXNj-4hVg

https://www.youtube.com/watch?v=N3BPzTXYlKI

This is about 22 minutes but thorough and informative:
https://www.youtube.com/watch?v=lEHwQ2yr84w

I read about a guy eventually trashing a wheel after
getting a serious
flat with one of the preslimed tubes. I'm not going to
go that route.

How? By what means? If the tube had a catastrophic
failure ie burst you
could crack the rim. But same goes for any other tube.
And takes some
impact to do so, way beyond what is reasonably expected.

And yes IrCOd missed or forgotten that BMX use 20inch
wheels and have gone
tubeless which probably makes sense.

--
C'est bon
Soloman

Roger Merriman

Maybe, but more commonly the tire leaves the rim, which
gets scuffed/ abraded on the pavement.

https://www.reddit.com/r/ebikes/comments/14tlgs9/
this_is_what_happens_when_you_have_a_catastrophic/

Which has nothing whatsoever to do with whether the tire/
tube had some sort of sealant in it or not.

Yes, that's right.

As the author notes, he knew the tire was near failure when
he added the goop.
--
Andrew Muzi
am@yellowjersey.org
Open every day since 1 April, 1971
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On Tue Aug 26 16:58:47 2025 Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 11:02 AM, Roger Merriman wrote:

Catrike Ryder <Soloman@old.bikers.org> wrote:

On Tue, 26 Aug 2025 08:47:10 -0500, AMuzi <am@yellowjersey.org> wrote: >>>

On 8/26/2025 8:03 AM, Catrike Ryder wrote:

On 26 Aug 2025 11:21:05 GMT, Roger Merriman <roger@sarlet.com> wrote: >>>>>

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I
got it the manual didn't say it was set up for schrader valves so since
the parts are all blackit took me a half hour to figure out that I had
to remove the rubber plug and the replace it with the Preta valve
fitting. Then the pump would not turn on though the charge was full.

Finally I stuck a screwdriver in the air exit and this moved the pumping
mechanism slightly and it operated fine after that.

With Silca tubeless sealant and tubeless tires you'd probably only have
to carry this pump on the bike. I'll let you know how that works out.
The Silca sealant is supposed to close 6 mm holes and I never had a
tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable.

No somewhat optimistically Silca and others do claim 6mm. >>>>>>>>>>
<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower
pressures, though I?ve found it (tubeless) is fairly reliable with thorn
holes, less so for slashes be that flint or glass.

Hence my roadie commuter has tubes and tyres with protection so I don?t
need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things:
https://www.yellowjersey.org/photosfromthepast/cciround.jpg >>>>>>>>> is necessarily big enough to have rent the fabric severely. >>>>>>>>

I'm among the skeptical as well. But I hesitate calling Silca liars so I
will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and
report back.

A slash is more likely to be sealed, than a circular hole which is likely
to have a 100% failure!

I--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On Tue Aug 26 07:54:17 2025 AMuzi wrote:

On 8/26/2025 12:00 AM, Jeff Liebermann wrote:

On Mon, 25 Aug 2025 17:58:44 -0500, AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I
got it the manual didn't say it was set up for schrader valves so since
the parts are all blackit took me a half hour to figure out that I had
to remove the rubber plug and the replace it with the Preta valve >>>>>>> fitting. Then the pump would not turn on though the charge was full. >>>>>>>
Finally I stuck a screwdriver in the air exit and this moved the pumping
mechanism slightly and it operated fine after that.

With Silca tubeless sealant and tubeless tires you'd probably only have
to carry this pump on the bike. I'll let you know how that works out. >>>>>>> The Silca sealant is supposed to close 6 mm holes and I never had a >>>>>>> tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable.

No somewhat optimistically Silca and others do claim 6mm.

<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower >>>>> pressures, though I?ve found it (tubeless) is fairly reliable with thorn
holes, less so for slashes be that flint or glass.

Hence my roadie commuter has tubes and tyres with protection so I don?t >>>>> need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things:
https://www.yellowjersey.org/photosfromthepast/cciround.jpg
is necessarily big enough to have rent the fabric severely.

I'm among the skeptical as well. But I hesitate calling Silca liars so I will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and
report back.

This might be useful information for someone living in Tom's
neighborhood.

"how many TIRES does it take to stop a bullet?" <https://www.youtube.com/watch?v=3drX-3SRqdjWw>
He starts off with a .22LR.

When I was younger and dumber, we were shooting at big heavy tractor
tires with .22LR from about 25ft. We were warned that the bullet
might bounce back in our direction. After about 50 rounds, one bullet broke a window about 50 ft behind us. Oops. After that, the
consensus was that shooting at hard rubber targets was a really bad
idea.

Yes that's right especially for thick truck tires. Bicycle
tires are a different thing, more like a cardboard target. I
measured the openings in a cardboard box target from 50
feet. They are about 6mm. (point blank would just shred a tire)

My suggestion was admittedly tongue in cheek as piercing a
tire without rim damage is not very likely. Still and all, a
6mm hole in a bicycle tire is a major catastrophic injury.
Moreso for thin fabric high pressure road tires, less so for
low pressure 26x5 and the like.

As I stated elsewhere, I did get a 6 mm puncture from a perhaps 1/8 inch screw on the road and the sealant I had at the time wouldn't even seal around the screw. So I'm trying the Silca. BTW, everything I've tried from Silca had been top quality.
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On Wed, 27 Aug 2025 07:51:13 -0500, AMuzi <am@yellowjersey.org> wrote:

MSDS: >https://cdn.shopify.com/s/files/1/0309/9521/files/1530965_SILCA_Tire_Sealant_Safety_Data_Sheet_US.pdf?v=1737724018

Thanks. However, the above MSDS only itemizes ingredients that are
toxic. The non-toxic ingredients, which make up 85 to 90% of the
sealant, are not listed.
--
Jeff Liebermann jeffl@cruzio.com
PO Box 272 http://www.LearnByDestroying.com
Ben Lomond CA 95005-0272
Skype: JeffLiebermann AE6KS 831-336-2558
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On Wed, 27 Aug 2025 05:45:49 -0400, Joy Beeson
<jbeeson@invalid.net.invalid> wrote:

On Tue, 26 Aug 2025 21:44:49 -0700, John B.
<jbslocomb@fictitious.site> wrote:

There is more than a little truth in that statement, much of it unsaid
as someone that is prepared to fix a flat likely knows more then a bit
about the vehicle the tire is mounted on. What makes it go and what
makes stop, so to speak, while the unprepared individual may know only
that the thing is called a "bicycle".

I've noticed that with store-bought shirts: if there are a
couple of spare buttons sewn into the hem, the other buttons
are sewn on properly and never fall off.

Agreed. I don't recall ever using the spare buttons for replacing
lost buttons.

I save the buttons from worn out clothes before turning the clothes
into shop rags. The real problem is finding a matching button in the
pickle jar.

I sometimes reinforce the button stitching on new shirts. I've bought
a few new shirts that look like the manufacturer was trying to use as
little thread on the buttons as possible.
--
Jeff Liebermann jeffl@cruzio.com
PO Box 272 http://www.LearnByDestroying.com
Ben Lomond CA 95005-0272
Skype: JeffLiebermann AE6KS 831-336-2558
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On 8/27/2025 11:03 AM, Jeff Liebermann wrote:

On Wed, 27 Aug 2025 07:51:13 -0500, AMuzi <am@yellowjersey.org> wrote:

MSDS:
https://cdn.shopify.com/s/files/1/0309/9521/files/1530965_SILCA_Tire_Sealant_Safety_Data_Sheet_US.pdf?v=1737724018

Thanks. However, the above MSDS only itemizes ingredients that are
toxic. The non-toxic ingredients, which make up 85 to 90% of the
sealant, are not listed.

And I found no MSDS for Orange Seal, TUFO or Panaracer
SealSmart at all. AIUI, these as a group are latex
emulsions, some with a fiber added to enhance clotting at
the puncture.
--
Andrew Muzi
am@yellowjersey.org
Open every day since 1 April, 1971
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

AMuzi <am@yellowjersey.org> wrote:

On 8/27/2025 1:13 AM, John B. wrote:

On 27 Aug 2025 05:33:15 GMT, Roger Merriman <roger@sarlet.com> wrote:

John B. <jbslocomb@fictitious.site> wrote:

On Tue, 26 Aug 2025 12:09:39 -0500, AMuzi <am@yellowjersey.org> wrote: >>>>

On 8/26/2025 11:58 AM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 11:02 AM, Roger Merriman wrote:

Catrike Ryder <Soloman@old.bikers.org> wrote:

On Tue, 26 Aug 2025 08:47:10 -0500, AMuzi <am@yellowjersey.org> wrote:

On 8/26/2025 8:03 AM, Catrike Ryder wrote:

On 26 Aug 2025 11:21:05 GMT, Roger Merriman <roger@sarlet.com> wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I
got it the manual didn't say it was set up for schrader valves so since
the parts are all blackit took me a half hour to figure out that I had
to remove the rubber plug and the replace it with the Preta valve
fitting. Then the pump would not turn on though the charge was full.

Finally I stuck a screwdriver in the air exit and this moved the pumping
mechanism slightly and it operated fine after that. >>>>>>>>>>>>>>>>>>
With Silca tubeless sealant and tubeless tires you'd probably only have
to carry this pump on the bike. I'll let you know how that works out.
The Silca sealant is supposed to close 6 mm holes and I never had a
tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable. >>>>>>>>>>>>>>>>>

No somewhat optimistically Silca and others do claim 6mm. >>>>>>>>>>>>>>>>
<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower
pressures, though I?ve found it (tubeless) is fairly reliable with thorn
holes, less so for slashes be that flint or glass. >>>>>>>>>>>>>>>>
Hence my roadie commuter has tubes and tyres with protection so I don?t
need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things: >>>>>>>>>>>>>>> https://www.yellowjersey.org/photosfromthepast/cciround.jpg >>>>>>>>>>>>>>> is necessarily big enough to have rent the fabric severely. >>>>>>>>>>>>>>

I'm among the skeptical as well. But I hesitate calling Silca liars so I
will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and >>>>>>>>>>>>> report back.

A slash is more likely to be sealed, than a circular hole which is likely
to have a 100% failure!

I?ve certainly had thorn and small flint slashes seal, the offending object
is always gone. So a few MM though some way off 6/7mm which is the upper
limit, and has tyre pressure increases it?s even less likely, hence this
works better with MTB tyres.

Roger Merriman

I'll pass. I understand the slime sealants make a mess on the inside
of your tires.

--
C'est bon
Soloman

under a minute:

https://www.youtube.com/watch?v=2MEXNj-4hVg

https://www.youtube.com/watch?v=N3BPzTXYlKI

This is about 22 minutes but thorough and informative:
https://www.youtube.com/watch?v=lEHwQ2yr84w

I read about a guy eventually trashing a wheel after getting a serious
flat with one of the preslimed tubes. I'm not going to go that route. >>>>>>>>

How? By what means? If the tube had a catastrophic failure ie burst you
could crack the rim. But same goes for any other tube. And takes some >>>>>>>> impact to do so, way beyond what is reasonably expected.

And yes I?d missed or forgotten that BMX use 20inch wheels and have gone
tubeless which probably makes sense.

--
C'est bon
Soloman

Roger Merriman

Maybe, but more commonly the tire leaves the rim, which gets
scuffed/abraded on the pavement.

https://www.reddit.com/r/ebikes/comments/14tlgs9/this_is_what_happens_when_you_have_a_catastrophic/

I have heard of that, some road bike tyres had rumours of sidewall failures
years back for example, but can?t see how a slime or copies ie sealant >>>>>> filled tube, can introduce a failure for either wheel or tyre, over >>>>>> standard tubes. I might be wary of the very cheap TPU as they have plastic
valves etc that to be vaguely on topic don?t like being heated up from >>>>>> being pumped up by an electric pump.

They apparently do get fairly warm.

Roger Merriman

Good point. The goop doesn't _cause_ the tire to demount.

That said, as with the reddit author above, using goop to
avoid replacement of worn/leaking systems can exacerbate the
likelihood of failure on the road. Or offroad, as the case
may be.

"also got sprayed by slime. All because I was a cheapskate
and wanted to wear down the old tire before buying new ones.
Now I bought two new tires and a new rear wheel.

But in general are "flats" really a problem in the cycle world,
today? I don't remember that they were during by biking days. I
carried a couple of spare tubes and an inflator in an under seat
holder and I remember using the second tube very, very, rarely. Once
or twice in years...
--

It also allows for pressure to be lower, as pinching the tube isnrCOt a
thing, and certainly for Gravel etc tyres you can definitely feel the
difference which I had been cynical about.

I used to get 1 or 2 punctures on the road bike per year, the Gravel bike >>> entirely possible to do that in a single ride!

I run tyres on the commute that can handle glass will be encountered as I >>> pass one section. And that will make a hole that is unlikely to be sealed. >>>
Ie it allows lower pressures which can be performance enhancing or not
depending on use case.

I canrCOt imagine it making much difference to CatTrike for example.

And for roadies definitely an argument for TPU tubes or just normal tubes >>> in terms of ease of use vs any performance gains, you do get a small
rolling resistance gain.

cheers,

John B.

Roger Merriman

Not to disagree but I ran "'sew up" tubular tires for many years and
only st0pp4d using them when my Bangkok shop stopped carrying them.
From memory very few flats.
Two spares and two throw a way tire inflators and still room under the
seat (:-)
--
cheers,

John B.

+1
In 55 years of riding tubular tires, including early today,
I have had flats but not inordinately. Just part of life;
not a hardship at all.

I suspect most roadies use is similar in that regard ie punctures are infrequent and generally a non issue, mine had been similar in the past.

Roger Merrriman

--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On Wed, 27 Aug 2025 12:13:14 -0500, AMuzi <am@yellowjersey.org> wrote:

On 8/27/2025 11:03 AM, Jeff Liebermann wrote:

On Wed, 27 Aug 2025 07:51:13 -0500, AMuzi <am@yellowjersey.org> wrote:

MSDS:
https://cdn.shopify.com/s/files/1/0309/9521/files/1530965_SILCA_Tire_Sealant_Safety_Data_Sheet_US.pdf?v=1737724018

Thanks. However, the above MSDS only itemizes ingredients that are
toxic. The non-toxic ingredients, which make up 85 to 90% of the
sealant, are not listed.

And I found no MSDS for Orange Seal, TUFO or Panaracer
SealSmart at all. AIUI, these as a group are latex
emulsions, some with a fiber added to enhance clotting at
the puncture.

Instead of MSDS, they probably use the new and improved SDS (Safety
Data Sheet), which standardizes the format but also allows
manufacturer to claim that some or all of their ingredients are
"proprietary" and therefore unlisted. Isn't progress wonderful?

Orange Seal SDS: <https://vaughanind.com/wp-content/uploads/2019/01/Orange-sealer-Safety-Data-Sheet.pdf>
INGREDIENT C.A.S. NUMBER
Dialkyl Quaternary Ammonium Chloride Proprietary
Mixed Petroleum Hydrocarbons 64741-44-2 5
2-Butoxyethanol 111-76-2
*Percentages of ingredients are being withheld as trade secret
information. This information will be disclosed as necessary to
authorized individuals


TUFO SDS: <https://cdnmedia.mapei.com/docs/librariesprovider2/products-documents/2_9018851_en_6e50013d3b544954a853838996fab9a3.pdf?sfvrsn=d3a8685f_0>
They only list 15 to 30% of their ingredients (by weight) as Portland
cement and hydraulic lime. Sounds like the ingredients for tile
grout.
--
Jeff Liebermann jeffl@cruzio.com
PO Box 272 http://www.LearnByDestroying.com
Ben Lomond CA 95005-0272
Skype: JeffLiebermann AE6KS 831-336-2558
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: rec.bicycles.tech

On 8/27/2025 1:08 PM, Jeff Liebermann wrote:

On Wed, 27 Aug 2025 12:13:14 -0500, AMuzi <am@yellowjersey.org> wrote:

On 8/27/2025 11:03 AM, Jeff Liebermann wrote:

On Wed, 27 Aug 2025 07:51:13 -0500, AMuzi <am@yellowjersey.org> wrote:

MSDS:
https://cdn.shopify.com/s/files/1/0309/9521/files/1530965_SILCA_Tire_Sealant_Safety_Data_Sheet_US.pdf?v=1737724018

Thanks. However, the above MSDS only itemizes ingredients that are
toxic. The non-toxic ingredients, which make up 85 to 90% of the
sealant, are not listed.

And I found no MSDS for Orange Seal, TUFO or Panaracer
SealSmart at all. AIUI, these as a group are latex
emulsions, some with a fiber added to enhance clotting at
the puncture.

Instead of MSDS, they probably use the new and improved SDS (Safety
Data Sheet), which standardizes the format but also allows
manufacturer to claim that some or all of their ingredients are
"proprietary" and therefore unlisted. Isn't progress wonderful?

Orange Seal SDS: <https://vaughanind.com/wp-content/uploads/2019/01/Orange-sealer-Safety-Data-Sheet.pdf>
INGREDIENT C.A.S. NUMBER
Dialkyl Quaternary Ammonium Chloride Proprietary
Mixed Petroleum Hydrocarbons 64741-44-2 5
2-Butoxyethanol 111-76-2
*Percentages of ingredients are being withheld as trade secret
information. This information will be disclosed as necessary to
authorized individuals

TUFO SDS: <https://cdnmedia.mapei.com/docs/librariesprovider2/products-documents/2_9018851_en_6e50013d3b544954a853838996fab9a3.pdf?sfvrsn=d3a8685f_0>
They only list 15 to 30% of their ingredients (by weight) as Portland
cement and hydraulic lime. Sounds like the ingredients for tile
grout.

Thank you.
Still and all, it's mostly latex which, as a non hazardous
material, is not enumerated.
--
Andrew Muzi
am@yellowjersey.org
Open every day since 1 April, 1971
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From Newsgroup: rec.bicycles.tech

On 8/26/2025 2:02 PM, Roger Merriman wrote:

Catrike Ryder <Soloman@old.bikers.org> wrote:

On 26 Aug 2025 16:02:11 GMT, Roger Merriman <roger@sarlet.com> wrote:

Catrike Ryder <Soloman@old.bikers.org> wrote:

On Tue, 26 Aug 2025 08:47:10 -0500, AMuzi <am@yellowjersey.org> wrote: >>>>

On 8/26/2025 8:03 AM, Catrike Ryder wrote:

On 26 Aug 2025 11:21:05 GMT, Roger Merriman <roger@sarlet.com> wrote: >>>>>>

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 5:45 PM, cyclintom wrote:

On Mon Aug 25 15:37:12 2025 AMuzi wrote:

On 8/25/2025 2:26 PM, Roger Merriman wrote:

AMuzi <am@yellowjersey.org> wrote:

On 8/25/2025 1:40 PM, cyclintom wrote:

I bought one of these since they are dirt cheap bto investigate. When I
got it the manual didn't say it was set up for schrader valves so since
the parts are all blackit took me a half hour to figure out that I had
to remove the rubber plug and the replace it with the Preta valve >>>>>>>>>>>>> fitting. Then the pump would not turn on though the charge was full.

Finally I stuck a screwdriver in the air exit and this moved the pumping
mechanism slightly and it operated fine after that.

With Silca tubeless sealant and tubeless tires you'd probably only have
to carry this pump on the bike. I'll let you know how that works out.
The Silca sealant is supposed to close 6 mm holes and I never had a
tubeless puncture larger than that.

I assume you meant 0.6mm which is much more probable.

No somewhat optimistically Silca and others do claim 6mm. >>>>>>>>>>>
<https://silca.cc/collections/tubeless-collection/products/ultimate-tubeless-sealant>

I suspect the 6 or 7mm upto is for folks with larger tyres at lower >>>>>>>>>>> pressures, though I?ve found it (tubeless) is fairly reliable with thorn
holes, less so for slashes be that flint or glass.

Hence my roadie commuter has tubes and tyres with protection so I don?t
need to worry about glass.

Roger Merriman

Count me among the skeptical.

An aperture big enough to pass one of these 5.5mm things:
https://www.yellowjersey.org/photosfromthepast/cciround.jpg >>>>>>>>>> is necessarily big enough to have rent the fabric severely. >>>>>>>>>

I'm among the skeptical as well. But I hesitate calling Silca liars so I
will try it and see.

Please fill a tire with Silca goop, shoot it with a .22 and
report back.

A slash is more likely to be sealed, than a circular hole which is likely
to have a 100% failure!

I?ve certainly had thorn and small flint slashes seal, the offending object
is always gone. So a few MM though some way off 6/7mm which is the upper
limit, and has tyre pressure increases it?s even less likely, hence this
works better with MTB tyres.

Roger Merriman

I'll pass. I understand the slime sealants make a mess on the inside >>>>>> of your tires.

--
C'est bon
Soloman

under a minute:

https://www.youtube.com/watch?v=2MEXNj-4hVg

https://www.youtube.com/watch?v=N3BPzTXYlKI

This is about 22 minutes but thorough and informative:
https://www.youtube.com/watch?v=lEHwQ2yr84w

I read about a guy eventually trashing a wheel after getting a serious >>>> flat with one of the preslimed tubes. I'm not going to go that route.

How? By what means? If the tube had a catastrophic failure ie burst you
could crack the rim. But same goes for any other tube. And takes some
impact to do so, way beyond what is reasonably expected.

And yes I-Ad missed or forgotten that BMX use 20inch wheels and have gone >>> tubeless which probably makes sense.

--
C'est bon
Soloman

Roger Merriman

He trashed the wheel because it was coated with goop.

Complete nonsense. All those tire sealants are latex based, it peels
off. If he considered the wheel to be trashed it was because he didn't
want to clean it.

ItrCOs going to eat a rim or even a tyre sidewall, itrCOs not even Dot fluid level of nastiness itrCOs fairly benign stuff, it doesnrCOt wash out of clothes
and donrCOt think it should go into drains but it certainly has no effect on wheels or tyres.

There are several fairly high quality small fold-up bikes that use 20
inch wheels, too.

https://bikefriday.com/

Yes and few others but they are extremely rare I see a Molton bike or two most summers as itrCOs that sort of area, but they are rare.

--
C'est bon
Soloman

Roger Merriman

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