The Stampede Pass is a 32mm tire. You're going to need a good bit more
pressure with a tire that narrow than you will for a 38mm tire.
On 07/26/2016 02:29 PM, Tim Gavin wrote:
I'm 220 lbs, and I use 45-50 psi front and 55-60 psi rear in my 38 mm
supple tires (Lierre, Pari Moto, et al).
I start with the "15% tire drop" method, as developed by Frank Berto
and further by Jan Heine
<http://www.bikequarterly.com/images/TireDrop.pdf>. Unfortunately,
Berto's charts only went up to 37 mm tires, so you have to
extrapolate/experiment with wider tires. Calculator here
<http://www.dorkypantsr.us/bike-tire-pressure-calculator.html>.
I'll add 5-10 psi if I'm fully loaded. I'll drop 5-10 psi if I'm
riding more gravel/trail/off-road.
I've found that 38 mm tires feel squirrely to me around 30-35 psi.
I ran 85 front / 100 rear on my Cerf blue 700 x 26 tires.
I run 60 front / 75 rear on my 700 x 32 Gravel King tires.
I run 30 front / 35 rear on my 26 x 2.1" Thunder Burts.
I run 7 front / 8 rear on my 26 x 4.6" fat bike tires.
On Tue, Jul 26, 2016 at 1:10 PM, Ron Mc <bulldog...@gmail.com
<mailto:bulldog...@gmail.com>> wrote:
210 lbs, running Barlows on my upright at 60psi rear, 40 psi front.
On my semi-upright, running Stampede at 65psi rear, 55 psi front.
Mostly concentrate on not shocking the rims and handling. I have
some big hills to go down. I've also noticed another squishiness
that can develop at high speed, when centrifugal forces are
stretching tje tire out and they don't have sufficient pressure
for good lateral stiffness, but I only see that if I let the
pressures drift a little below the numbers above.
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