Crossfire Tech and others I am curious to see what PSI you have set on your crossfire tires. I have the Pilot Sports. On the door it says optimum PSI should be 32 in front, 33 in rear. On the tire it says maximum PSI is 50. My car is only 1 month old, has about 1k miles, and PSI is about _40_ for all 4, which is how I got my car.

HOWEVER, I dropped the PSI in the back to 35, and it actually seems to handle significantly better, as I think the lower pressure allows the tire to make more contact with the ground when going around turns.

So to whoever else has fiddled with this, tell us what you've found!

 

i stay with the 32/3 cold. much more than that and i expect it to lose traction/grab, get noisy and maybe fail at high speed.

dan

 

the 32/33 door recommendation was most likely specified for ride comfort. when it comes to high speed turns, higher pressures (within limitations)are better unless the road is bumpy and the tires lose contact with the ground. higher pressure keeps the tire from deforming, or "rolling over", onto the sidewall which causes a loss in grip since the sidewall is much harder than the tread. higher tire pressures will also result in better gas mileage and can even prolong the tread life of the tire. lower tire pressures will provide better traction in snow, mud, sand, etc. chances are that if someone has autocrossed their car they added pressure prior to the event. i'm running approximately 34 psi right now. since these tires are such low profile, running much higher will really sacrifice ride comfort. and since they're performance tires and have strong sidewalls with such a low profile it is difficult in most driving conditions to lose traction anyway.

 

I do the 32/33 thing as well. I check the pressure a minimum of once a month. If you don't already have one, spend a few bucks on an air compressor for your garage.