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Old 08-13-2014, 10:15 AM
cschade cschade is offline
Motorized Bicycle Senior Member
Join Date: Aug 2014
Location: United States
Posts: 50
Default Re: Gear ratios for HF bike -- please help!

Originally Posted by Dan View Post
Just playing with the calc. 12T/30T, 10T/40T to 26T/30T works out to 11.54:1 and 33 MPH at 5,000 RPM. (RPM really depends on the weather but that is what mine does when happy and weather permitting. most days just a tad less)

Am just playing around. I forgot you said you lived in a hilly area. HFs are not fun to pedal. Really wide.
Thanks for those ideas Dan. I'd really not rather have a separate jackshaft running to the pedal cranks, in other words, I want to stick to using the pedal cranks as the jackshaft. I'd also rather not buy a pre made solution (DIYer through and through). So, the bike rear gears need to stay the same. The sprockets I have choice on are the clutch (11 or 12 teeth), jackshaft in, and jackshaft out. Ideas?
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