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Old 05-28-2010, 11:32 AM
5-7HEAVEN 5-7HEAVEN is offline
Motorized Bicycle Elite Member
Join Date: Aug 2008
Posts: 1,912
Default Re: Question for "Friction Drivers"

In the end, it's up to how you and your individual setup performs on the hills around you. A negligible amount for you might be very satisfying for another rider.

I've used every friction roller size from 1.125" to 1.50". Each one had their positives and negatives. Since I need to keep up with traffic with very few hills, my favorite is the 1.5" spindle.

Gears on the bike is the biggest difference. With a 24-speed bike, pedal-assist plus ANY roller size would work for me.

On a single-speed bike, roller size is more important for hillclimbing.
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