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Unread 25-10-2011, 17:51
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Andy Baker Andy Baker is offline
President, AndyMark, Inc.
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Re: Dual CIM+CIMple box powered bike

Quote:
Originally Posted by hipsterjr View Post
Off the top of my head I can't remember the stock ratio of the 2005 AndyMark gearbox I used (to lazy to look it up), but from the gear box to the wheel is 2.65 : 1. I do remember that I calculated the wheel RPM to be about 140 at the cim motor's peak torque band (geared way down to climb hills that cover Clemson).

That is the FIRST Kit gearbox from 2005, designed by Paul Copioli and sold by IFI. It has an reduction of 12.75:1. So, your overall reduction is 33.8:1. If we multiply this number by your desired max wheel rpm to be 140, then the max motor rpm will be around 4700.

Andy B.