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BrianG · 10.27.2008, 12:20 AM

Well, that's probably because gear ratio is simply the result of dividing two gear tooth counts. So, for a 90T spur and 20T pinion, the ratio is 4.5:1.

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BrianG RC-Monster Admin Offline Posts: 14,609 Join Date: Nov 2005 Location: Des Moines, IA	10.27.2008, 12:20 AM Well, that's probably because gear ratio is simply the result of dividing two gear tooth counts. So, for a 90T spur and 20T pinion, the ratio is 4.5:1.