

(edit with Customer reassurance module)
(edit with Customer reassurance module)
(edit with Customer reassurance module)
This steel gear solve the problem of nylon gear's short life. It is more durable than nylon gear. It design for Bafang BBS01B BBS02B and BBSHD mid-motor. The working sound is about 80db, the noise is louder than nylon gear, but it does not affect the riding experience, and it can not be felt when riding.