Fat Tyre Electric Bicycle Cassette Motor

This rear-drive motor, which is compatible with the disc brake, has a rated power of 250W,350W,500W and 750W, a reduction ratio of 1: 5 and a maximum torque of 80 N.m, providing ideal power for vehicles. Strong and efficient, this motor, working together with a cassette or freewheel speed change mechanism, greatly enhances riding comfort and is suitable for beach buggies and snow bikes.
 

Rated Power (W)	250W	350W	500W	750W
Rated Voltage (DCV)	36V / 48V
Position	Rear Motor
Construction	Gear drive
n0 (Rpm)	325 / 245
nT(Rpm)	290 / 205
Max Torque	80 N.m
Axle	175mm / 190mm
Gearshift	Cassette / Freewheel
Cabling Route	Through Shaft, Right
Magnet Poles (2P)	20
Spoke	36H*12G
Efficiency (%)	≥ 80 %
Noise Grade (dB)	< 55
Operating Temperature	-20-45ºC
Reduction Ratio	1:5
IP	IP 65
Certifications	CE / ROHS

Why do we use a Double Walled Rim and heavy duty 36 Gauge Spokes?  

In the beginning we tried various kits and many of the brush less motors were very good motors. The problem with most of the conversion kits available are that they are spoked incorrectly, use a single walled weak rim., have spokes that are the wrong length causing the spokes to be bent in an "s" shape. Simply put bicycle wheels were not made for this type of torque on them and on occasion you will need to tighten your spokes until they finally "seat" themselves.