ZSM3185B- 3 Speed Automatic Rear Hub Motor For Small Wheel E-bikes

Features:

• Comply with EU motor power regulations.

• The transmission and motor complement & optimize each other, with better performance and longer durability. The transmission supplements motor torque, no need large motor torque or big motor discharge current,which increases mileage. When pedaling hard, the motor helps the hub move forward, reducing the force on transmission.

• Three-speed automatic shift, more transmission ratios, match the shifting demands of bicycles below 24 inches, light starting at low speed and low cadence at high speed.

• Automatic shift, no manual operation, simple and comfortable riding.

• Use large modulus gears that far exceed Shimano, higher gear strength and durability.

• The start gear adopts a self-centering one-way clutch,high torque and quiet,longer life and faster cutting angles, no empty pedaling, power can be entered at any angle.

• Internal shift, no shift cable. Simple layout, good appearance, suitable for the simple design needs of small-wheel bikes.

• Mature hub motor module,   lower cost and failure rate than mid-motor.