TongSheng TSDZ2 36V 250W 350W 48V 500W Torque Sensored DIY eBike Mid Drive Crank Motor Kit Electric Bike Central Motor Conversion Kit and Optional 36V 48V Batteries

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[Zero Start Performance] — Because the torque sensor can accurately detect the foot force, and give it several times in time.
It can output accurate torque signal when it is at rest, with excellent zero start performance.
[Labor / Power-saving] — When climbing a hill, it is as labor-saving as starting.
Flat riding is extremely energy efficient and power saving.
[Perfect Combination] — Since the output is proportional to the output of the person, the coordination is good, and it can be said that the perfect combination of people and machines.
The motor has an extra support mount – resulting in a much more reliable install than a Bafang BBS motor.