Upgraded Design ChainRing Adapter for Bafang MidMotor For M500 M510 M620
For bafang M500/G520, M510/G522, for M600/G521M620/G510, M420/G332, M615/M820. Used to replace electric bike part，forM500 M510 for M600 M620 G510 G521 series motors. easy to use and install,M620 G520 needs to add a washer good compatibility.