Kadell Wheel Electric Bicycle Motor Kit 24V/36V 250W Bicycle Cycling Engine Electric Bicycle E-Bike Conversion Kit Motor Controller Fit For 22-28 In.

from George

It is fine for the brushed DC motor of this unit. It will run in either direction with no problem. But the unit uses a pair of gears. They are helical. Helical gears produce axial thrust. If you reverse the polarity, probably because you want to mount the unit on the left side of the bike, ...

from eblilly6

This works very good. I had to do all kinds of stuff to it to get it to work for me because I have a 10 speed and needed to put it on the opposite side. I had to research if I could reverse the polarity because the company told me I couldn't, but I was seeing that others selling the same motor ...

from David

Need to improve on installation instructions,had to buy sprocket that bolted to spokes to make it go right.mounts on left rear corner of frame,could not line up on right side of my frame,controller wiring not marked good,have look at manufacturers website and try to get it better.But you cannot b...

from George

It is fine for the brushed DC motor of this unit. It will run in either direction with no problem. But the unit uses a pair of gears. They are helical. Helical gears produce axial thrust. If you reverse the polarity, probably because you want to mount the unit on the left side of the bike, ...

from eblilly6

This works very good. I had to do all kinds of stuff to it to get it to work for me because I have a 10 speed and needed to put it on the opposite side. I had to research if I could reverse the polarity because the company told me I couldn't, but I was seeing that others selling the same motor ...