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Old 01-15-2010, 04:03 PM
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Re: lower mpg with new michelins

Quote:
Originally Posted by dan fitz View Post
looking at a circumference calculator online, the difference is 3.07 %, not much. .
not entirely correct. your new tires have fresh, deep tread. The old tires were worn-out, so the new tires have additional circumference that is not taken into account by the calculator.
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