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  1. 05-19-2010, 03:35 PM #11
    KrazyKarl02
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    Quote Originally Posted by DRAGOONRANCH View Post
    You trying to figure diameter in inches or feet? I am thinking feet.

    If you want to do it in inches, use this formula.

    (MPH * 63360)/(3.14*D*60)

    I plugged it into excel, and a 35" tire at 2150rpm and 60mph get you a wheel RPM of 576.52 and a 3.73 axle ratio.
    Yes, feet.... Sorry, I assumed someone in College would be able to figure this out. But then again I would assume someone in college would not ask the question of how to figure a ratio out.... My mistake

    Of course the entire thing probably will not work, since I do not think HP's tird runs.
    Last edited by KrazyKarl02; 05-19-2010 at 03:37 PM.
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