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      07-12-2012, 01:56 PM   #2
zipstic
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Drives: 2008 e92 335xi
Join Date: Sep 2011
Location: Minneapolis

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Depends on the rolling diameter of the tires. The general rule of thumb is to stay within 1%, but I would feel better if the revs per mile is 3 or less. You'll have to do some math to figure it out.
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