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      05-27-2010, 03:38 PM   #8
Gearhead999s
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Drives: E93 335is(wifes)E92 M3
Join Date: Apr 2007
Location: Toronto

Posts: 6,705
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I generally start at about 32-34 psi and aim for 40-42 psi when the tires are hot.I have seen pressure increases of up to 15 lbs from the crappy R888's when I had poor rear grip.Even at the low tire pressures cold tire roll over has not been much of an issue.
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