I Might Just Know What I'm Talking About
Join Date: Aug 2001
Location: San Antonio, TX
Thanked 2 Times in 2 Posts
Re: Tire Air Pressure
I don't know why the shop put 10 psi more than the recommended tire pressure. There is a reason the tire maker wanted it to be at 35. When you drive the tire heats up and expandes the air inside the tire. It is going to put you at risk of having a blowout vs. a flat if you hit something on the road. It could be that they want you to wear out your tires sooner so that you come back and buy more.
I always stay about 5 psi under the pressure listed on the sidewall. Another thing to remember is that the sidewall listed psi is almost always the MAX.
Like box said, too much air wears the center, and too low wears the outer edges. Your also going to have a much stiffer ride with the extra 10 psi. Also, always check the pressure when the tires are cool to get an accurate reading.
I recommend that you run 30, but that's just me. Rotate at about every 3000 miles and you should get plenty of life from your tires. You will have much better contact on the road, and a much nicer ride quality.