Retro series can install hub motor, power range is from 250w to 1000w, normally we choose Bafang brand hub motors;
but if you go after speed, we would like to recommend 1000w Mac brand hub motor, which speed can reach 55km/h;
besides hub motors, we can also install mid motor on it, but we only use 1000w BBSHD which focus on torque;
so, you can pick the item according to your different requirements. We use cadence sensor as standard and torque sensor as advanced.
