Bafang BBS02 750W
Bafang's BBS02B is the most popular aftermarket mid-drive conversion motor worldwide. The 750W (48V) version produces 100 Nm of torque and roughly 1200W peak, driving the chain through a 1:21.9 two-stage helical reduction with a 44T chainring. It has an integrated 9-FET (trapezoidal/square-wave) controller, a 12-magnet cadence PAS ring, and uses the Bafang UART display protocol. Fits standard 68/73mm threaded bottom brackets; IPX5 water resistance.
In brief: 750W mid-drive motor. Fits 68–73mm bottom bracket. 48–52V rated. From $375 across 3 sellers.
Specs verified Oct 25, 2026
Where to Find
Prices tracked across 5 sellersLuna Cycle
$375.00
Electrify Bike
$499.00
AliExpress - IEBIKE Motor Battery Store
$521.21 + free shipping
Amazon
Check seller for priceEM3ev
Out of stock* WattWorks may earn a commission from some sellers linked here. Sellers are ranked by total price and stock status only. Learn more
Price History
Current best price $499.00. Over the past 90 days: low $375.00, high $736.84, average $481.58 — up 4% vs average.
- Electrify Bike
- EM3ev
- Luna Cycle
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Specifications
Performance
- Wattage
- 750W
- Peak Wattage
- 1200W
- Rated Voltage
- 48–52V
- KV Rating
- 59
- Max Torque
- 100.00Nm
- Max Speed
- 45km/h
- Chainring Teeth
- 44
Fitment
- Bottom Bracket Width
- 68mm – 73mm
Features
- PAS Sensor Type
- Cadence
- Temp Sensor
- None
Physical
- Weight
- 4.15 kg
- Dimensions (L×W×H)
- 200mm × 112mm
- IP Rating
- IPX5
Ports & Connectors
| Pin | Wire color | Function |
|---|---|---|
| 1 | Brown | Battery + |
| 2 | Orange | Power Switch Signal |
| 3 | Green | UART RX |
| 4 | Yellow | UART TX |
| 5 | Black | Ground |
| Pin | Wire color | Function |
|---|---|---|
| 1 | Red | 5V Power |
| 2 | Black | Ground |
| 3 | Blue | Throttle Signal |
| Pin | Wire color | Function |
|---|---|---|
| 1 | Red / White | Brake Signal (Low) |
| 2 | Black | Ground |
| Pin | Wire color | Function |
|---|---|---|
| 1 | Red / White | Brake Signal (Low) |
| 2 | Black | Ground |
| Pin | Wire color | Function |
|---|---|---|
| 1 | Red | 5V Power |
| 2 | Black | Ground |
| 3 | Yellow / White | Speed Signal |
| Pin | Wire color | Function |
|---|---|---|
| 1 | Red / Brown | 12V Power |
| 2 | Black | Ground |
