Bafang 350w Mid Frive Motor kit

With an integrated speed sensor, this BBS(MM G31) mid-drive motor, which is compatible with standard bikes, has a rated power of 250W,350W and 500W, a reduction ratio of 1: 21.9 and a maximum torque of 80 N.m, providing ideal power for vehicles. This BBS(MM G31) mid motor need your bicycle bottom bracket is 68mm or 100mm.Light but strong and efficient, this BBS mid motor greatly enhances riding comfort and is suitable for touring bikes and commuter bikes. This BBS(MM G31) mid motor is black.