Just installed my DAX GT 50R motor on my friction drive bicycle with a 1 1/2 inch roller.
All I can say is Holy Mother of God......my bike is now a small motorcycle-it can *easily* keep up with traffic.
I gotta be careful, bicycles aren't meant to go 35 to 40 mph.
When they say this motor will run circles around most motors...they ain't kidding!
This thing PULLS and pulls *hard* to whole way up to 35mph.
I know That's DAX has an ad on the site.....I gotta say, they have a customer for life, they have great customer service and most importantly to me- they have great communication....every email I've sent them with a question has been answered in less then 24 hours.
I am a very happy boy :-)