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Old 07-12-2010, 05:35 PM   #62

cowboy1948's Avatar
Drives: 10 LT2/RS-08 SILVERADO-05 COBALT
Join Date: Jun 2009
Location: OHIO
Posts: 929

When replacing rear tires. It is good to remember that the new tire diameter when change your final gear ratio.

Here is the math. New tire dia divided by the old tire dia times the current gear ratio equals the new gera ratio.

30.7 divided by 28.7 equals 1.07 Times 3.42 equals 3.66 new gear ratio.

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