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Old 04-21-2015, 07:58 AM   #5 (permalink)
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On my Ranger after replacing the OE 14 inch wheels with 15s, I calculated the adjustment at 1.026 for the increased diameter of the replacement tires. I just multiplied theodometer reading by 1.026 to get the corrected reading that accurately replected the true distance.
I went back and recalculated my previous entries to the date when I replaced the wheels and tires.

regards
mech
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