Tyre pressures

[vincereynard]

On my Elan best handling is at around 31 to 32 psi hot which means around 26 psi cold for the 175 /60 x 13 Yokohama A-048R tyres I am currently using. In the wet i increase cold pressures to around 28 psi and hot pressure will be around 30 to 31 psi.


Rohan

You have me confused now Rohan.
31 to 32 psi hot which means around 26 psi cold
hot pressure will be around 30 to 31 psi = 28 psi cold ?

[Orsom Weels]

On my Elan best handling is at around 31 to 32 psi hot which means around 26 psi cold for the 175 /60 x 13 Yokohama A-048R <a rel="nofollow" href="http://www.mytyres.co.uk/" target="_blank" class="vglnk"><span>tyres</span></a> I am currently using. In the wet i increase cold pressures to around 28 psi and hot pressure will be around 30 to 31 psi.


Rohan

You have me confused now Rohan.
31 to 32 psi hot which means around 26 psi cold
hot pressure will be around 30 to 31 psi = 28 psi cold ?

I think Rohan is pointing out the difference between dry & wet conditions? When it's wet, the water has a cooling effect & the tyres don't warm up as much, so the pressures don't rise as much, therefore, you start with slightly higher pressure than you would in the dry, but ideally end up a pound or two below what you would run on a dry track.

Tim

[rgh0]

On my Elan best handling is at around 31 to 32 psi hot which means around 26 psi cold for the 175 /60 x 13 Yokohama A-048R <a rel="nofollow" href="http://www.mytyres.co.uk/" target="_blank" class="vglnk"><span>tyres</span></a> I am currently using. In the wet i increase cold pressures to around 28 psi and hot pressure will be around 30 to 31 psi.


Rohan

You have me confused now Rohan.
31 to 32 psi hot which means around 26 psi cold
hot pressure will be around 30 to 31 psi = 28 psi cold ?

I think Rohan is pointing out the difference between dry & wet conditions? When it's wet, the water has a cooling effect & the tyres don't warm up as much, so the pressures don't rise as much, therefore, you start with slightly higher pressure than you would in the dry, but ideally end up a pound or two below what you would run on a dry track.

Tim

Yes Tim exactly what i was trying to say.

cheers
Rohan

[vincereynard]

My apologies - I did not read the post properly -

Wet, cooler track - less heat build up - less expansion and, hence, pressure change.

I'll get me coat.