Description
One-Way Clutch — BAFANG BBS01 & BBS02 (Not BBSHD)
Internal pawl/freewheel clutch · Fits BBS01 and BBS02 only · Workshop-level install
Fits BBS01 & BBS02 only
Internal reduction-gear part
Not BBSHD compatible
Workshop-level install
What the Clutch Actually Does
Mounted on the pedal-crank side inside the reduction-gear assembly, this one-way clutch lets the pedals spin independently of the drivetrain whenever the motor or momentum is turning the chain faster than you’re pedalling. Put simply, it’s what stops the motor forcibly spinning your feet backward off the pedals when you coast or when the assist kicks in hard. Without a functioning clutch, that separation between motor speed and pedal speed disappears.
Signs the Clutch Is Wearing Out
A clunking, grinding or clicking noise when pedalling — especially under load or at low speed — is the most commonly reported symptom. Some riders also notice a loose or “spongy” feel where the pedals don’t fully engage the drive, or slip under a hard pedalling effort. If you’ve pulled the motor apart already and found metal shavings inside the case, that’s consistent with a failing clutch too.
This is a genuine workshop job, not a five-minute swap: it means opening the motor casing, removing the axle lock nut with the correct Bafang tool, extracting the bearing and gear assembly, then compressing the clutch’s spring tabs to swap it out before reassembling in the right order. If you’d rather not do that yourself, our full Bafang service covers exactly this repair.
Fitment
Fits the BBS01 250W kit, BBS02 750W UART kit and BBS02B CAN-BUS kit. Pairs with the BBS01 controller, and if you’re replacing other worn internals at the same time, the BBS02 rotor is the same-generation part most often replaced alongside it.
Warranty and Returns
Every Clutch purchased from All4eBikes is covered by a 12-month warranty against manufacturing defects, alongside a 30-day return window.
Not Sure Which Motor You Have?
Send us a photo of your motor’s casing sticker and we’ll confirm whether you need this or the BBSHD clutch.
📍 2 Beresford Road Lane, Roath, Cardiff CF24 1QU | 📞 07920 781 258

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