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, on a 26 inch bike, it can run about 35km/h. The difference between the 24V, 36V and 48V is the working current, if you want to ride longer, I recommend 36V or 48V kit. This motor need to assemble to the wheel rim by yourself, if you do not know how to assemble it, you'd better ask a local bike shop to help you. This motor has the black color also, if you want the black color, please tell me when you place the order. Include brake rotor, if you want these parts, please contact me, thanks a lot. Model: L-Q02 Voltage: 24 / 36 / 48 Volt Output: 250 Watt Brake Type: V brake / Disc brake Max Speed: 290 RPM Rated Efficiency:? 78% Suitable for: bike front fork 100mm Net weight: 2.95 KG. This motor has the black color also, if you want the black color, please feel free to contact me. Motor mounted on bike for reference.