RM G020.250.D

This rear-drive motor, which has a rated power of 250W, a reduction ratio of 1: 5 and a maximum torque of 45 N.m, provides ideal power for vehicles. Strong and efficient, this motor greatly enhances riding comfort and is suitable for touring bikes, commuter bikes and mountain bikes. It can be black, grey or silver.


Core Data

Position Rear Motor
Wheel Diameter (Inch) 20/26/27.5/28
Construction Gear drive
Rated Voltage (DCV) 36/43/48
n0 (Rpm) 325 ; 245
Rated Power (W) 250
nT(Rpm) 290 ; 205
Max Torque 45 N.m
Efficiency (%) ≥ 80
Color Black / Silver
Weight (kg) 3.3
Noise Grade (dB) < 55
Operating Temperature -20-45℃

Mounting Parameters

Brake Disc Brake
Installation Widths (mm / OLD) 138
Max. Housing Diameter (mm) 158.5
Cabling Route Through Shaft, Right
Cable Length(mm), Connection Type 250 G9.1
Gearshift Freewheel(6S/7S/8S/9S)
Spoke Specification 36H*12G

Further Specifications

Speed Detection Signal (Pulses/Cycle) 6
Reduction Ratio 1:5
Magnet Poles (2P) 20

Tests & Certifications

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


Dimension A 74mm
Dimension B 42.5mm
Dimension C 158.5mm
Dimension D 145mm
Dimension E 44mm
Dimension F Φ33mm
Dimension G 2–M12 x 1.25–6g
Dimension H 5.6mm
Dimension I 20mm
Dimension J 41mm
Dimension K 15.25mm
Dimension WL 63.5mm
Dimension WR 74.5mm
Dimension OLD 138mm

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