1. Torque sensor mm and Speed sensor mm
2. Shift gear range 39 to 54
3. Controller inside
4. 20-40kmh;28Nm-60Nm
Also appears to have a range of chainwheels to suit various wheel sizes.
http://www.alibaba.com/product-gs/702022359/Middle_motor_250W_350W_500W_750W.html
Edit: Spec features changed.
2. Shift gear range 39 to 54
3. Controller inside
4. 20-40kmh;28Nm-60Nm
Also appears to have a range of chainwheels to suit various wheel sizes.
http://www.alibaba.com/product-gs/702022359/Middle_motor_250W_350W_500W_750W.html
Edit: Spec features changed.
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