Bafang M420 is a 250W CAN-bus mid-drive with an integrated speed + torque sensor, 80 Nm of torque, and a 1:33.4 reduction ratio. The motor uses 8 magnet poles (4 pole pairs) and is rated IP65. It runs the Bafang CAN protocol over a triangle connector and requires a purpose-built frame with motor mounting tabs — it is not retrofittable onto a standard threaded BB shell.
In brief: 250W mid-drive motor. 43V rated. From $350.
Specs verified Jun 10, 2026
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Specifications
Performance
- Wattage
- 250W
- Rated Voltage
- 43V
- Max Torque
- 80.00Nm
Features
- PAS Sensor Type
- Torque
- Temp Sensor
- None
Physical
- Weight
- 3.6 kg
- IP Rating
- IP65
Ports & Connectors
Display Port
CAN Bus
| Pin | Wire color | Function |
|---|---|---|
| 1 | Brown | Battery + |
| 2 | Orange | 5V Power |
| 3 | Black | Ground |
| 4 | White | CAN Low |
| 5 | Green | CAN High |
