there's alot of things to factor into tire pressure. there's a book that has all the information printed out for you. most good shops will have one. tirerack might even sell it. i forget what it's called but the sales people always check it when one of us gets confused.

for this size i'd say no less then 35. the only exception to the rule that i can think of is yokohama parada's. they say 35psi max. unless the tire says otherwise you shoul dreally run between 35-42.

http://www.ocaddict.com

thanks beefgg for the sig