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Gearing question.

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Old Dec 23, 2009 | 06:04 PM
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Redleg
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Gearing question.
Fellas' I need to find out what the actual axle rpm will be at the wheel for 2:23 gearing as well as 3:55 gearing at say 2000 rpm, for example. The only charts I've found give vehicle speed at a given rpm.

Thanks.
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Old Dec 23, 2009 | 07:15 PM
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Originally Posted by Redleg
Fellas' I need to find out what the actual axle rpm will be at the wheel for 2:23 gearing as well as 3:55 gearing at say 2000 rpm, for example. The only charts I've found give vehicle speed at a given rpm.

Thanks.
The answer is going to depend on your transmission ratio as well, but assuming a direct drive or 1:1 ratio on the tranny, I think the formula you are looking for is RPM/tranny ratio/axle ratio

2000/1/2.23=896.86 RPM
2000/1/3.55=563.38 RPM
Last edited by waldersha; Dec 23, 2009 at 07:17 PM. Reason: Was using the NEW math.
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Old Dec 23, 2009 | 08:38 PM
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Thanks, that helps. Did you just do the figuring, or is there a link to a chart somewhere?
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Old Dec 23, 2009 | 09:23 PM
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I just did the figuring. Couldn't find a chart.
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