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Old 12-05-2008, 09:50 PM
5-7HEAVEN 5-7HEAVEN is offline
Motorized Bicycle Elite Member
Join Date: Aug 2008
Posts: 1,912
Default Re: Need mental and ratio help! Please!

A gear ratio of 11.41:1 would spin an engine at 6,000rpm to reach 40mph.

You would need 6t/32t sprockets(5.33333:1), then

8t/44t sprockets(5.5:1), then

36t/14t final drive(.389:1).

5.33333 X 5.5 = 29.33333

29.333333 x .389 = 11.41

I might be wrong, so someone else can doublecheck.

Last edited by 5-7HEAVEN; 12-05-2008 at 09:54 PM.
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