Friction motorized bicycle

have a look at this, for some insight on friction drive.

http://www.motoredbikes.com/showthread.php?t=4175

pi & the math don't lie!!:D

on friction drive, the top speed is not affected by the tire size. only the amount of torque you'll have. (smaller tire = less torque)
yes....a larger friction wheel will give you more top speed....but there is a trade off. you'll have to pedal more to get up to speed.
 
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