Characteristic:
    1. Light weight:3.2kg
    2. Smart: the OD of the boss is 141mm
    3. This motor apply the epicyclic gear and belongs to high speed motor, and the speed can reach 5000rpm.  After breaking the speed of boss falls to 100-400rpm, so the torque of motor is very large.
        a. Quick start-up, good acceleration. From 0 to 24km/s only need 6 seconds.
        b.When need big torque, the batteary can be protected.
        c. Excellent climbing performance.
    4. The motor's structure apply the roller-type overrunning clutch, when the power is off, the motor can automatic get rid of the divering part, no damp just like a bike.
    5. This motor can be used in wide range, form 16" to 26", from 12V to 48V, from 9km/h to 32km/h, we can always produce according to our custom's requirement.