For Bafang MidMotor Ebike Chainring 104BCD 34T/36T/38T/40T Aluminum Alloy
For bafang M500/G520, M510/G522, for M600/G521M620/G510, M420/G332, M615/M820. teeth: 34T ,36T ,38T,40T options. Material: aluminum alloy. Used to replace electric bike part，forM500 M510 for M600 M620 G510 G521 series motors.