Quote:
Originally Posted by NHRABill
I am not telling you how to setup your car and there is no universal PSI number but there is one thing we all can agree on is that under inflated tires are bad thing unless you go to the race track with me where I set my slicks anywhere from 6 to 15 PSI on most days, weather and track conditions vary.
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The "universal" PSI is the sidewall max, the safest pressure for the tire. Anything less is "under-inflated". When I go to the race track, I am well over 40 psi on my tires, and the placard in the door jamb is 28 psi. If I run the car's "recommended" pressure, I would roll my tires onto the sidewalls with the grip and G forces.