EricJB Posted November 16, 2011 Report Share Posted November 16, 2011 I thought some of you might find this helpfull. To calculate MPH RPM x tire diameter( in inches) __________________________ drive ratio (R and P x any gear) x 336 To calculate RPM MPH x drive ratio x 336 ____________________ tire diameter With a piece of graph paper and a calculator, you can see what RPM's, or MPH, you are at, at any point. Quote Link to comment
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