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Harmonic Drive

Harmonic Drive

Compact and High Torque Transmission System

Discover an extraordinary riding experience with our KH Gears' mid-drive motor. Powered by our patented harmonic gear transmission system, originally developed for robotic arms, it eliminates pedaling inefficiencies. Enjoy the compact yet powerful design, delivering an impressive torque of 56Nm.

High-Efficiency Motor

High-Efficiency Motor

Permanent-magnet Synchronous Motor (IPM)

Our advanced motor utilizes precise current control, ensuring optimal torque and speed efficiency across a wide range. With the same battery capacity and riding conditions, KH Gears high-speed motor outperforms others in both efficiency and endurance.

 
 

Torque Sensor

Speed Sensor

Cadence Sensor

Experience Seamless Power Assistance with 360-Degree Sensors

High-precision and highly-integrated sensors

Utilizing high-permeability materials, our transmission module integrates torque and cadence sensors, ensuring not only high precision but also high integration.

Specification

Specification

Ultimate Frame Design Flexibility

Our product seamlessly integrates into the downtube of your e-bike, allowing for a sleek and seamless appearance. With its compact design, it perfectly hides within the frame, offering unmatched flexibility in e-bike frame design.

Modular Design

Modular Design

Convenient Assembly and Maintenance

Our modular design simplifies assembly, reduces maintenance time and costs, and allows for effortless product upgrades.

 
 
 
 
Specification
Motor Location
Downtube
Motor Type
DC Busniess Motor
Continuous Rating
250 W
Speed Limit
25 km/hr
Maximum Torque
56 Nm
Maximum Cadence
120 rpm
Voltage
DC 36 V
Communication Protocol
CAN bus 2.0B
Bluetooth
Optional
Torque Sensor
YES
Cadence Sensor
YES
Speed Sensor
YES
IP Level
IPX5
Mandrel
130 mm
OBD System
YES
Power-Assist Modes
OFF / ECO / NORMAL / SPORT (Customizable)