I have a polini puch e50 with a proma circuit pipe. I way 235, and the bike is for daily commuting in New York (so, I want a stop-and-go bike that will cruise all day at 35 and hit low 40's when I need it to). What kind of gearing should I be running? Ideally, I would like to calculate it in terms of rpm, but I'm not sure what the ratio of the crank shaft to the primary gear is, and I'm not sure what rpms the proma hits at. Does anyone know what that ratio/those rpms are?
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