From Newsgroup: rec.bicycles.tech

Bicycle tires, not economics

https://www.renehersecycles.com/tire-pressure-calculator/
--
Andrew Muzi
am@yellowjersey.org
Open every day since 1 April, 1971

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From Newsgroup: rec.bicycles.tech

On 6/24/2026 10:42 AM, AMuzi wrote:

Bicycle tires, not economics

https://www.renehersecycles.com/tire-pressure-calculator/

Wonder what a Trike would be? I think on my Catrike I use lower pressure
by far than the tires say around 80psi rear and 75 front,,
--
Deacon Mark
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From Newsgroup: rec.bicycles.tech

AMuzi <am@yellowjersey.org> wrote:

Bicycle tires, not economics

https://www.renehersecycles.com/tire-pressure-calculator/

Interesting. I'm surprised the front and rear pressures are
the same. My rear tire always wears much faster than the front,

It's gotta be weight, it sure ain't horsepower.

8-)

bob prohaska

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From Newsgroup: rec.bicycles.tech

Mark J cleary <mcleary08@comcast.net> wrote:

On 6/24/2026 10:42 AM, AMuzi wrote:

Bicycle tires, not economics

https://www.renehersecycles.com/tire-pressure-calculator/

Wonder what a Trike would be? I think on my Catrike I use lower pressure
by far than the tires say around 80psi rear and 75 front,,

Seems about what IrCOd expect for a 28mm tyre which is what seems to be what the internet suggests the rear tyre width is, my old school roadie has 28
which I run 80psi on being a commuter itrCOs relatively heavy 14KG or so, so more or less same as the CatTrike, though looks like lot of the CatTrike
weight is forward, though since thatrCOs supported by two front wheels may
not exhibit increased wear.

Roger Merriman

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From Newsgroup: rec.bicycles.tech

On 6/24/2026 3:45 PM, Roger Merriman wrote:

Mark J cleary <mcleary08@comcast.net> wrote:

On 6/24/2026 10:42 AM, AMuzi wrote:

Bicycle tires, not economics

https://www.renehersecycles.com/tire-pressure-calculator/

Wonder what a Trike would be? I think on my Catrike I use lower pressure
by far than the tires say around 80psi rear and 75 front,,

Seems about what IrCOd expect for a 28mm tyre which is what seems to be what the internet suggests the rear tyre width is, my old school roadie has 28 which I run 80psi on being a commuter itrCOs relatively heavy 14KG or so, so more or less same as the CatTrike, though looks like lot of the CatTrike weight is forward, though since thatrCOs supported by two front wheels may not exhibit increased wear.

Roger Merriman

I don't know but the problem isn't tire wear, per se.

It's optimal deformation for the weight on that wheel and,
in the case of a tricycle, side loads as well.

Too low and there's excessive deformation leading to fabric
damage and 'squishy' cornering. Multiply that for tricycles.

Too high, and rider comfort may suffer. Plus, as Mr Heine
first tested years ago, extremely high pressures (a more
rigid casing) can be less efficient rolling resistance on
real-world roads.
--
Andrew Muzi
am@yellowjersey.org
Open every day since 1 April, 1971
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From Newsgroup: rec.bicycles.tech

AMuzi <am@yellowjersey.org> wrote:

On 6/24/2026 3:45 PM, Roger Merriman wrote:

Mark J cleary <mcleary08@comcast.net> wrote:

On 6/24/2026 10:42 AM, AMuzi wrote:

Bicycle tires, not economics

https://www.renehersecycles.com/tire-pressure-calculator/

Wonder what a Trike would be? I think on my Catrike I use lower pressure >>> by far than the tires say around 80psi rear and 75 front,,

Seems about what IrCOd expect for a 28mm tyre which is what seems to be what >> the internet suggests the rear tyre width is, my old school roadie has 28
which I run 80psi on being a commuter itrCOs relatively heavy 14KG or so, so >> more or less same as the CatTrike, though looks like lot of the CatTrike
weight is forward, though since thatrCOs supported by two front wheels may >> not exhibit increased wear.

Roger Merriman

I don't know but the problem isn't tire wear, per se.

It's optimal deformation for the weight on that wheel and,
in the case of a tricycle, side loads as well.

Too low and there's excessive deformation leading to fabric
damage and 'squishy' cornering. Multiply that for tricycles.

I suspect be more so for MTB or at least the gravity folks, who can burp or roll tyres, so that even a wide XC MTB tyre will wander as you load up the
side walls though the berms loading up the pressures wonrCOt prevent this, hence the Gravity tyres are give or take double the weight of XC tyres for
the same size, as they have substantial reinforced sidewalls.

If one uses XC tyres in such situations one will need to baby the tyre and
even so sooner or later itrCOs likely to fail quite probably dramatically so.

Too high, and rider comfort may suffer. Plus, as Mr Heine
first tested years ago, extremely high pressures (a more
rigid casing) can be less efficient rolling resistance on
real-world roads.

That much is definitely true, even if I rather suspect this was known in
some circles long before Mr Heine who does like to self promotion!

I run 80psi on the roadie as itrCOs a commuter so need a margin or error plus itrCOs tubes so if I bottom out the tyrerCa

If tubeless IrCOd drop 10/20psi or so.

Roger Merriman

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From Newsgroup: rec.bicycles.tech

On Wed, 24 Jun 2026 18:06:25 -0000 (UTC),
bp@www.zefox.net <bp@www.zefox.net> wrote:

AMuzi <am@yellowjersey.org> wrote:

Bicycle tires, not economics

https://www.renehersecycles.com/tire-pressure-calculator/

Interesting. I'm surprised the front and rear pressures are the
same. My rear tire always wears much faster than the front,

It's gotta be weight, it sure ain't horsepower.

Whatever the reason, the faster rear tire wear is even more
noticeable on my tandem.
--
Ted Heise <theise@panix.com> Gretna, NE, USA
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From Newsgroup: rec.bicycles.tech

Ted Heise <theise@panix.com> wrote:

On Wed, 24 Jun 2026 18:06:25 -0000 (UTC),
bp@www.zefox.net <bp@www.zefox.net> wrote:

AMuzi <am@yellowjersey.org> wrote:

Bicycle tires, not economics

https://www.renehersecycles.com/tire-pressure-calculator/

Interesting. I'm surprised the front and rear pressures are the
same. My rear tire always wears much faster than the front,

It's gotta be weight, it sure ain't horsepower.

Whatever the reason, the faster rear tire wear is even more
noticeable on my tandem.

Maybe it is horsepower then. I'd think a tamdem would have
a long enough wheelbase for relatively even weight distribution.

It would have something close to double the power, perhaps a bit
less since the stoker is usually the smaller rider.

Thanks for writing!

bob prohaska

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From Newsgroup: rec.bicycles.tech

<bp@www.zefox.net> wrote:

Ted Heise <theise@panix.com> wrote:

On Wed, 24 Jun 2026 18:06:25 -0000 (UTC),
bp@www.zefox.net <bp@www.zefox.net> wrote:

AMuzi <am@yellowjersey.org> wrote:

Bicycle tires, not economics

https://www.renehersecycles.com/tire-pressure-calculator/

Interesting. I'm surprised the front and rear pressures are the
same. My rear tire always wears much faster than the front,

It's gotta be weight, it sure ain't horsepower.

Whatever the reason, the faster rear tire wear is even more
noticeable on my tandem.

Maybe it is horsepower then. I'd think a tamdem would have
a long enough wheelbase for relatively even weight distribution.

I guess the pressure difference for same tyre drop ie squish would show how equal the weight is?

It would have something close to double the power, perhaps a bit
less since the stoker is usually the smaller rider.

Thanks for writing!

bob prohaska

Roger Merriman

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From Newsgroup: rec.bicycles.tech

Roger Merriman <roger@sarlet.com> wrote:

<bp@www.zefox.net> wrote:

Ted Heise <theise@panix.com> wrote:

On Wed, 24 Jun 2026 18:06:25 -0000 (UTC),
bp@www.zefox.net <bp@www.zefox.net> wrote:

AMuzi <am@yellowjersey.org> wrote:

Bicycle tires, not economics

https://www.renehersecycles.com/tire-pressure-calculator/

Interesting. I'm surprised the front and rear pressures are the
same. My rear tire always wears much faster than the front,

It's gotta be weight, it sure ain't horsepower.

Whatever the reason, the faster rear tire wear is even more
noticeable on my tandem.

Maybe it is horsepower then. I'd think a tamdem would have
a long enough wheelbase for relatively even weight distribution.

I guess the pressure difference for same tyre drop ie squish would show how equal the weight is?

Yes, but I'm not sure what you're getting at....

It would have something close to double the power, perhaps a bit
less since the stoker is usually the smaller rider.

Thanks for writing!

bob prohaska

Roger Merriman

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From Newsgroup: rec.bicycles.tech

<bp@www.zefox.net> wrote:

Roger Merriman <roger@sarlet.com> wrote:

<bp@www.zefox.net> wrote:

Ted Heise <theise@panix.com> wrote:

On Wed, 24 Jun 2026 18:06:25 -0000 (UTC),
bp@www.zefox.net <bp@www.zefox.net> wrote:

AMuzi <am@yellowjersey.org> wrote:

Bicycle tires, not economics

https://www.renehersecycles.com/tire-pressure-calculator/

Interesting. I'm surprised the front and rear pressures are the
same. My rear tire always wears much faster than the front,

It's gotta be weight, it sure ain't horsepower.

Whatever the reason, the faster rear tire wear is even more
noticeable on my tandem.

Maybe it is horsepower then. I'd think a tamdem would have
a long enough wheelbase for relatively even weight distribution.

I guess the pressure difference for same tyre drop ie squish would show how >> equal the weight is?

Yes, but I'm not sure what you're getting at....

The % difference assuming you have the tyre drop the same front and rear
would show the weight distribution, frames with slacker geometry tend to
have % more pressures rear than front. Though itrCOs still quite close.

It would have something close to double the power, perhaps a bit
less since the stoker is usually the smaller rider.

Thanks for writing!

bob prohaska

Roger Merriman

Roger Merriman

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From Newsgroup: rec.bicycles.tech

On Wed, 24 Jun 2026 18:06:25 -0000 (UTC), bp@www.zefox.net wrote:

AMuzi <am@yellowjersey.org> wrote:

Bicycle tires, not economics

https://www.renehersecycles.com/tire-pressure-calculator/

Interesting. I'm surprised the front and rear pressures are
the same. My rear tire always wears much faster than the front,

It's gotta be weight, it sure ain't horsepower.

8-)

bob prohaska

"Myths Debunked: Front and Rear tires should run at (roughly) the same pressure" <https://www.renehersecycles.com/myth-11-rear-tires-should-run-at-higher-pressure/>
"Today, we explain why your bikeAs weight distribution does not
directly translate into your tire pressures."
--
Jeff Liebermann jeffl@cruzio.com
PO Box 272 http://www.LearnByDestroying.com
Ben Lomond CA 95005-0272 AE6KS 831-336-2558

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