This motor is for the bike front wheel, the front fork width is 100mm. If you do not know what kit you need, please send me your vehicle picture and tell me your request. This motor is a brushless gear motor, it can not reverse, and it can run about 35km/h on a 26 inch bike. The difference between the 36V and 48V is the working current, if you want to ride longer, I recommend 48V kit.
This motor has the black color and silver BAFANG color, please choose the correct option, thank you.