Bafang BBS02B 750W Mid-Drive Kit
The value mid-drive that started the DIY revolution. 750W of geared climbing power for hundreds less than the BBSHD — perfect for commuters and lighter builds.
The BBS02B is the sweet spot for most conversions. It gives you true mid-drive climbing and the same excellent Bafang display/PAS ecosystem at a price that undercuts almost every factory e-bike. For a commuter, light tourer, or around-town build under ~250 lb total system weight, it is all the motor you need.
Its limit is heat and the nylon primary gear: lug it up long, steep climbs at low cadence and you can cook it. Keep your cadence up, shift smartly, and it will run for years. Builders who want set-and-forget power on hills step up to the BBSHD; everyone else is well served here.
Where to buy
Two paths — match your spend to the build. Quality picks last longer and come with real support; affordable picks get you rolling for less. Always confirm fitment, voltage, and connectors for your bike first.
Quality picks
Affordable picks
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Pro tips from our test team
- Add an aftermarket gear-shift sensor to cut power during shifts and save the nylon gear.
- Keep cadence above 60 rpm on climbs to manage heat.
- The 'B' revision controller is the one to buy — earlier versions had weaker FETs.