Tyre pressure for wheel load

super slim

Zen MBB Master

When looking at the tables, a lightweight Super Slim 113 kgs (248 lbs) should have been running 148 and 142 psi on my Continental 4000s 700 *23 tyres, instead of 100 psi (dry), 90 psi (wet) front and 100 psi rear as the maximum pressure is 120 psi.
This means that the sidewalls were deflecting too much, increasing rolling resistance and when cornering this tyre was very skittish, especially on rough corners.

I suppose that is part of reason why going to a 28 mm wide tyre, with recommended pressures for my weight is 107 psi (F) and 102 psi (R) for the 15% vertical deflection of the tyre for the best rolling resistance and comfort.

I could not notice any reduced rolling resistance, but noticed a MASSIVE comfort and cornering speed increase.
I now run at 110 psi F(Dry) 100 psi F (wet), and 100 psi R.
I can not increase the rear pressure as the tyre increases in diameter, so the tyre is rubbing on the Silvio V1.0 rear fork crown at 115 psi, and 3 mm at 100 psi.

May all your rides be as smooth as a baby's bottom.

Super Slim

http://www.dorkypantsr.us/bike-tire-pressure-calculator.html

http://www.adventurecycling.org/default/assets/resources/200903_PSIRX_Heine.pdf



 

Charles.Plager

Recumbent Quant
The link you've provided does

The link you've provided does the right thing, but just a reminder to people is that you need to figure out the load per tire to calculate the PSI in that tire. So it's not 250 lbs per tire but (say) 150 for one tire and 100 for the other...

And yes, us "good sized" people should not be riding on 23s... :D
 
Top