The Bafang M500 (G520) is a CAN-bus torque-sensing OEM mid-drive for eTrekking and eCity bikes. Rated 250W with 95 Nm of torque, it combines a speed and torque sensor, runs 36–48V, and weighs ~3.2 kg. It communicates over the Bafang CAN protocol via a triangle connector and is NOT compatible with UART BBS displays. IP65. Crank interface is a Bafang proprietary spline (NOT ISIS) on a 104 BCD 4-bolt spider accepting 32–40T chainrings; it requires a purpose-built frame with motor mounting tabs and is not retrofittable to a standard BB-shell bike.
In brief: 250W mid-drive motor. 36–48V rated. From $399.
Specs verified Jun 5, 2026
Where to Find
Prices tracked across 2 sellersPrice History
Current best price $399.00. Over the past 90 days: low $399.00, high $399.00, average $399.00 — about average.
- Greenbikekit
| Date | Price | Shipping | Total | Change | Coupon | Rating | Sales | In Stock | Status |
|---|---|---|---|---|---|---|---|---|---|
Greenbikekit(1 record) | |||||||||
| Jun 5, 202603:12 AM | $399.00 | — | $399.00 | Initial | — | — | — | Yes | active |
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Specifications
Performance
- Wattage
- 250W
- Rated Voltage
- 36–48V
- Max Torque
- 95.00Nm
Features
- PAS Sensor Type
- Torque
- Temp Sensor
- None
Physical
- Weight
- 3.2 kg
- Dimensions (L×W×H)
- 196mm × 44mm × 126mm
- IP Rating
- IP65
Ports & Connectors
| Pin | Wire color | Function |
|---|---|---|
| 1 | Brown | Battery + |
| 2 | Orange | 5V Power |
| 3 | Black | Ground |
| 4 | White | CAN Low |
| 5 | Green | CAN High |
