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Old 11-03-2011, 06:01 PM
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richirich richirich is offline
Motorized Bicycle Elite Member
Join Date: Aug 2011
Location: Port Angeles, Washington
Posts: 297
Default Re: What RPM on tach=what speed

If you got to - Motorized Bicycle Forum - Powered by vBulletin the other site and go to the heading "wild in the streets" the first sticky should be a gear ratio calculator.
First enter 20 for the first gear(the small clutch gear) then 82 (for the large clutch gear) then 10 (for the small sprocket) then 40 for your rear sprocket, then input your tire size and rpm and it will give you your MPH
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