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Old 03-30-2009, 06:18 PM   #38 (permalink)
ChrisSlicks
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They pick 35 because that is the compromise number. The same tire on an Infiniti they would probably pick 33 to make it a little softer. On my Infiniti I would often go to 45 psi up front during auto-x to optimize grip with all the body roll. On the street I'm usually right around 36. If it's a wet auto-x you can deflate them some for a little more predictability.

Your tire isn't going to blow out at 45, but you would be more likely to break a belt if you hit a sharp object or a large pothole. It takes about 140 psi to make a tire explode.
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