This item is for the bike that uses the hub diameter less than 36mm.
It is made of environmentally friendly materials, environmentally friendly, durable, easy to use, and simple to operate.
Motor use freewheel so when wheel rotating, the motor will not rotate, just like a normal bike, this can reduce resistance.
It is made of quality materials, easy to use, and simple to operate.
This is our newest kit for electric common bike, this kit mounts the sprocket on the wheel spokes, so it fits most of bicycle wheel.