Thread: Will I need a new tune??
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Old Tue, October 6th, 2009, 12:59 PM
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The gear change with no tire size difference equates to a 21% difference.

I've attached a really neat calculator that will take tire size, rear gear ratio and transmission ratios to provide an RPM per MPH value for each gear. Hopefully it's useful.

Take care.
Attached Files
File Type: xls RPM vs MPH Calculator.xls (31.5 KB, 0 views)
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Last edited by Power Hungry; Tue, October 20th, 2009 at 11:25 PM.
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