Tongsheng TSDZ2B 500W
The Tongsheng TSDZ2B 500W is a BB-mount torque-sensing mid-drive motor for e-bike conversions. It fits standard 68–73mm bottom brackets and integrates both torque and cadence sensing for highly natural pedal assistance. Supports disc and V-brake systems. IPX5 waterproof rated. Popular for North American and performance builds where 500W is permitted.
In brief: 500W mid-drive motor. Fits 68–73mm bottom bracket. 48V rated. From $285 across 3 sellers.
Specs verified Jul 14, 2026
Where to Find
Prices tracked across 3 sellersAliExpress
$284.69
AliExpress
$294.74
AliExpress - PSWpower EU France Store
$326.41
AliExpress - AliExpress - Greenergy Global Store
$395.24
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Specifications
Performance
- Wattage
- 500W
- Rated Voltage
- 48V
- Max Torque
- 80.00Nm
- Max Speed
- 35km/h
Fitment
- Bottom Bracket Width
- 68mm – 73mm
Features
- PAS Sensor Type
- Torque
- Temp Sensor
- None
Physical
- Weight
- 3.86 kg
- IP Rating
- IPX5
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 |
