24V,36V,48V Electric Bicycle Rear Motor/E-bike Brushless High Speed Spoke Wheel Hub Motor, View rear wheel brushless electric bicycle motor, Product Details from Suzhou Xiongda Electric Machine Co., Ltd. on Alibaba.com
G250RY-CA Integrated Spoke Hub Motor 36V250W has Controller Built in+PEDAL Speed Sensor+DISPLay ELECTRIC BIKE CONVERSION KIT - AliExpress
BAFANG E-Bike Motor 250W 36V Hinterradmotor, 219,99 €
Bafang Hinterradmotor 250 Watt Steckkasette - Elektrofahrrad Umbausatz auch mit Mittelmotor Bafang BBS01 erhältlich