The Bafang BBS02 750W is a mid-drive conversion kit that replaces your bottom bracket and crankset, turning a standard bike into a pedal-assist e-bike. It uses a version B motor and an upgraded 25A controller with nine IRFB3077 MOSFETs, and the kit includes a battery and charger. Because it drives through the gears and freewheels cleanly, it climbs better than a hub motor and pedals like a normal bike when the motor is off. It suits riders converting a 68–73mm bottom bracket bike who want strong torque and a natural feel; hub kits are simpler to fit but feel less like a bicycle and handle hills worse.
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Riders rate the kit highly, praising its power, quiet running and natural feel compared with hub motors. Complaints center on the throttle being tied to assist level and on setup and battery pairing.
The Bafang BBS02 750W is a mid-drive e-bike conversion kit. The motor mounts in place of the bike's bottom bracket and replaces the crankset and the front derailleur, if the bike has one. The kit includes the version B motor and an upgraded 25 amp controller with 9 IRFB3077 MOSFETs. It converts most bikes with a 68–73mm bottom bracket into electric bikes.
The motor can freewheel completely, so the bike pedals like a normal bike. Pedal assist sensors let the rider choose the level of motor assistance. A throttle is also included for when the rider wants a break from pedaling, and it is limited to the pedal assist level in use. The LCD display shows speed, time, battery information and pedal assist power.
Chainring choice is a trade-off. A smaller tooth count gives more torque and better hill climbing. A larger tooth count gives a higher top speed. Connections are plug and play, with upgraded Anderson battery connectors. Compatibility with batteries not supplied with this kit is not guaranteed. Pairing the motor with an incompatible battery can damage the controller and other parts or cause communication errors.
