RM G380.220.D

This rear-drive motor, which has an inner rotor, is compatible with a disc and has a rated power of 220W. Because of its inner rotor design and a large reduction ratio (1:12.5), the motor's power can be effectively released. Small in size, light in weight, high in efficiency, and smooth & quiet in running, this motor is suitable for city bikes. This motor can be black or silver.

The motor is with external three speed flywheel 9T.


Core Data

Position Rear Motor
Wheel Diameter (Inch) 16/20
Construction Gear dirve
Rated Voltage (DCV) 36/43
n0 (Rpm) 335; 370
Rated Power (W) 220
nT(Rpm) 290 ; 325
Max Torque 30 N.m
Efficiency (%) ≥ 80
Color Black / Silver
Weight (kg) 2.2
Noise Grade (dB) < 55
Operating Temperature -20-45℃

Mounting Parameters

Brake Disc Brake
Installation Widths (mm / OLD) 120
Max. Housing Diameter (mm) 124
Cabling Route Through Shaft, Left
Cable Length(mm),Connection Type 180 G9.1
Gearshift Single speed
Spoke Specification 28H*13G

Further Specifications

Speed Detection Signal (Pulses/Cycle) 6
Reduction Ratio 1:12.5
Magnet Poles (2P) 8

Tests & Certifications

IP IP 65
Certifications ROHS / CE
Salt Spray Test Standard(h) 96


Dimension A 79 mm
Dimension B 41 mm
Dimension C Φ124mm
Dimension D Φ114mm
Dimension E Φ44mm
Dimension F Φ33mm
Dimension G 2–3/8-26UNF-2A
Dimension H 0 mm
Dimension I 15.25 mm
Dimension J 21 mm
Dimension K 11mm
Dimension L 47.5 mm
Dimension WL 60 mm
Dimension WR 60 mm
Dimension OLD 120 mm

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