Tongsheng TSDZ2 OSF Coaster Brake (350W)
Torque-sensing 36V 350W geared mid-drive motor based on the Tongsheng TSDZ2 platform, shipping with Open Source Firmware (OSF) pre-installed and a built-in coaster-brake-compatible freewheel that locks when pedaled in reverse. Fits 68-73mm BSA threaded bottom brackets with a 42T chainring; OSF unlocks a 24-52V operating range, FOC motor control, and configurable assist levels. Throttle and walk-assist are disabled on the coaster-brake version for safety.
In brief: 350W mid-drive motor. Fits 68–73mm bottom bracket. 24–52V rated.
Specs verified Oct 16, 2026
Where to Find
Prices tracked across 1 sellerPrice History
Current best price $525.00. Over the past 90 days: low $525.00, high $525.00, average $525.00 — about average.
- Electrify Bike
Reviews
No reviews yet — be the first to share your experience.
Sign in with Google to leave a review.
Specifications
Performance
- Wattage
- 350W
- Peak Wattage
- 750W
- Rated Voltage
- 24–52V
- Max Torque
- 80.00Nm
- Max Speed
- 32km/h
- Chainring Teeth
- 42
Fitment
- Bottom Bracket Width
- 68mm – 73mm
Features
- PAS Sensor Type
- Torque
- Temp Sensor
- None
Physical
- Weight
- 3.6 kg
Ports & Connectors
| Pin | Wire color | Function |
|---|---|---|
| 1 | Blue | Battery + |
| 2 | Black | Ground |
| 3 | Red | Power Switch Signal |
| 4 | Brown | UART TX |
| 5 | Yellow | UART RX |
| 6 | Green | Brake Signal (Low) |
| 7 | White | 5V Power |
| 8 | Orange | Throttle Signal |
| Pin | Wire color | Function |
|---|---|---|
| 1 | No color | None |
| 2 | Brown | 5V Power |
| 3 | Green | Low Beam |
| 4 | Orange | Ground |
| 5 | No color | None |
| 6 | White | Speed Signal |
