One man's opinions
https://www.renehersecycles.com/new-tpu-tubes-brompton-and-fmb-tubulars/
AMuzi <am@yellowjersey.org> wrote:
One man's opinions
https://www.renehersecycles.com/new-tpu-tubes-brompton-and-fmb-tubulars/
IrCOd be very interested to hear how well sealant in a tubular does work, considering how poorly tubes with sealant work, and with the narrow tyre sizes and thus higher pressures which generally sealant doesnrCOt like, and indeed with the previous Gravel bike that had narrower clearances so had to run higher pressures, quite often it would drop to 30psi before sealing and thatrCOs with tubeless let alone a TPU tube.
Glad that are tubs still being made and so on, but put me in the cynical
pile for TPU tubes will seal well.
Roger Merriman
One man's opinionsThe real advantage of tubulars isn't ride feel but the fact that they are glued to the rims and don't fall off under stress when flat or spin on the rim. Paris Roubaix really demonstrated the weaknesses of tubeless tires this year.
https://www.renehersecycles.com/new-tpu-tubes-brompton-and-fmb-tubulars/
On Thu May 21 15:38:09 2026 AMuzi wrote:
One man's opinions
https://www.renehersecycles.com/new-tpu-tubes-brompton-and-fmb-tubulars/
The real advantage of tubulars isn't ride feel but the fact that they are glued to the rims and don't fall off under stress when flat or spin on
the rim. Paris Roubaix really demonstrated the weaknesses of tubeless tires this year.
On 5/21/2026 4:24 PM, Roger Merriman wrote:
AMuzi <am@yellowjersey.org> wrote:
One man's opinions
https://www.renehersecycles.com/new-tpu-tubes-brompton-and-fmb-tubulars/
IrCOd be very interested to hear how well sealant in a tubular does work,
considering how poorly tubes with sealant work, and with the narrow tyre
sizes and thus higher pressures which generally sealant doesnrCOt like, and >> indeed with the previous Gravel bike that had narrower clearances so had to >> run higher pressures, quite often it would drop to 30psi before sealing and >> thatrCOs with tubeless let alone a TPU tube.
Glad that are tubs still being made and so on, but put me in the cynical
pile for TPU tubes will seal well.
Roger Merriman
When modern latex sealer was new (late 1990s) I picked up a
staple in a new tubular, added some latex and it was fine;
it had a normal life.
In defense of latex sealer, some riders do ask too much of
it. For a staple or thorn, probably yes. For big gashes,
fabric separation, chronic blowoffs, seating issues from the
wrong rim liner, an undersized rim or what have you, no.
AMuzi <am@yellowjersey.org> wrote:
On 5/21/2026 4:24 PM, Roger Merriman wrote:Think slime tubes, aka tubes where around by early 90rCOs remember using them if briefly, always found the failure and mess wasnrCOt worth the effort.
AMuzi <am@yellowjersey.org> wrote:
One man's opinionsIrCOd be very interested to hear how well sealant in a tubular does work, >>> considering how poorly tubes with sealant work, and with the narrow tyre >>> sizes and thus higher pressures which generally sealant doesnrCOt like, and >>> indeed with the previous Gravel bike that had narrower clearances so had to >>> run higher pressures, quite often it would drop to 30psi before sealing and >>> thatrCOs with tubeless let alone a TPU tube.
https://www.renehersecycles.com/new-tpu-tubes-brompton-and-fmb-tubulars/ >>>
Glad that are tubs still being made and so on, but put me in the cynical >>> pile for TPU tubes will seal well.
Roger Merriman
When modern latex sealer was new (late 1990s) I picked up a
staple in a new tubular, added some latex and it was fine;
it had a normal life.
In defense of latex sealer, some riders do ask too much ofWhat about the sealant aging? And eventually cleaning out the gunk? Now admittedly Gravel tyres go through more than road or even CX tyres.
it. For a staple or thorn, probably yes. For big gashes,
fabric separation, chronic blowoffs, seating issues from the
wrong rim liner, an undersized rim or what have you, no.
Roger Merriman
On 5/24/2026 7:01 AM, Roger Merriman wrote:
AMuzi <am@yellowjersey.org> wrote:
On 5/21/2026 4:24 PM, Roger Merriman wrote:Think slime tubes, aka tubes where around by early 90As remember using them >> if briefly, always found the failure and mess wasnAt worth the effort.
AMuzi <am@yellowjersey.org> wrote:
One man's opinionsIAd be very interested to hear how well sealant in a tubular does work, >>>> considering how poorly tubes with sealant work, and with the narrow tyre >>>> sizes and thus higher pressures which generally sealant doesnAt like, and >>>> indeed with the previous Gravel bike that had narrower clearances so had to
https://www.renehersecycles.com/new-tpu-tubes-brompton-and-fmb-tubulars/ >>>>
run higher pressures, quite often it would drop to 30psi before sealing and
thatAs with tubeless let alone a TPU tube.
Glad that are tubs still being made and so on, but put me in the cynical >>>> pile for TPU tubes will seal well.
Roger Merriman
When modern latex sealer was new (late 1990s) I picked up a
staple in a new tubular, added some latex and it was fine;
it had a normal life.
In defense of latex sealer, some riders do ask too much ofWhat about the sealant aging? And eventually cleaning out the gunk? Now
it. For a staple or thorn, probably yes. For big gashes,
fabric separation, chronic blowoffs, seating issues from the
wrong rim liner, an undersized rim or what have you, no.
admittedly Gravel tyres go through more than road or even CX tyres.
Roger Merriman
Slime is horrid stuff; nothing good to say about it.
The early latex sealant, brand name Seal-N-Air, was
wonderful in a compressed-air cartridge. Very reliable. But
it had a since-banned propellant and disappeared.
(Velox now has a similar product which I have not used)
Yes, latex probably does solidify in a tubular, but given
average life of my tires it's just not a significant factor.
Regarding latex, for a simple tread puncture a small amount
(1 or 2 ounces) is enough when followed by either riding or
just spinning the wheel to fling it to the outside. I do
see fat (700-50, -60, -70) tubeless with huge heavy lumps at
one spot, which I'd consider an own-goal error by the rider.
On Sun, 24 May 2026 08:22:48 -0500, AMuzi <am@yellowjersey.org> wrote:
On 5/24/2026 7:01 AM, Roger Merriman wrote:
AMuzi <am@yellowjersey.org> wrote:
On 5/21/2026 4:24 PM, Roger Merriman wrote:Think slime tubes, aka tubes where around by early 90rCOs remember using them
AMuzi <am@yellowjersey.org> wrote:
One man's opinionsIrCOd be very interested to hear how well sealant in a tubular does work, >>>>> considering how poorly tubes with sealant work, and with the narrow tyre >>>>> sizes and thus higher pressures which generally sealant doesnrCOt like, and
https://www.renehersecycles.com/new-tpu-tubes-brompton-and-fmb-tubulars/ >>>>>
indeed with the previous Gravel bike that had narrower clearances so had to
run higher pressures, quite often it would drop to 30psi before sealing and
thatrCOs with tubeless let alone a TPU tube.
Glad that are tubs still being made and so on, but put me in the cynical >>>>> pile for TPU tubes will seal well.
Roger Merriman
When modern latex sealer was new (late 1990s) I picked up a
staple in a new tubular, added some latex and it was fine;
it had a normal life.
if briefly, always found the failure and mess wasnrCOt worth the effort. >>>
In defense of latex sealer, some riders do ask too much ofWhat about the sealant aging? And eventually cleaning out the gunk? Now
it. For a staple or thorn, probably yes. For big gashes,
fabric separation, chronic blowoffs, seating issues from the
wrong rim liner, an undersized rim or what have you, no.
admittedly Gravel tyres go through more than road or even CX tyres.
Roger Merriman
Slime is horrid stuff; nothing good to say about it.
The early latex sealant, brand name Seal-N-Air, was
wonderful in a compressed-air cartridge. Very reliable. But
it had a since-banned propellant and disappeared.
(Velox now has a similar product which I have not used)
Yes, latex probably does solidify in a tubular, but given
average life of my tires it's just not a significant factor.
Regarding latex, for a simple tread puncture a small amount
(1 or 2 ounces) is enough when followed by either riding or
just spinning the wheel to fling it to the outside. I do
see fat (700-50, -60, -70) tubeless with huge heavy lumps at
one spot, which I'd consider an own-goal error by the rider.
I saw a guy dealing with a green slime filled tire once and said,
"I'll never ever do that."
--
C'est bon
Soloman
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