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      11-12-2012, 12:41 PM   #15
Tim603
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Drives: 2007 328xi coupe
Join Date: Feb 2012
Location: Manchester Nh

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Quote:
Originally Posted by PSUSMU View Post
Original Tires Diameter (in.) 25.09
New Tires Diameter (in.) 25.3
Difference in diameter (in.) 0.217
Percent Difference % 0.856
I believe it has to do with the circumference. The Rear tires circumference and the Front tires circumference and the difference between the two. Your original tires are irrelevant
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