1、Superior Material: Aluminum alloy are used to effectively improve the edge of the wheel hub, which is light and high end, comfortable and has strong bearing capacity. 2、Low Noise Operation: Electric bicycle rear wheel hub motor is designed for less than 55dB noise, realize noiseless operation, let you fully enjoy the riding pleasure. 3、Waterproof Performance: Strong and durable, fine workmanship, good toughness and good waterproof performance, provide better protection for the internal circuit, making it more durable. 4、Wonderful Riding Experience: Electric bike rear wheel conversion motor is easy to maintain, high efficiency, greatly improve riding fun, suitable for riders who like a challenge. 5、Wide Range of Uses: Rear wheel electric bicycle hub motor is widely suitable for electric bicycles, DIY electric bicycles, electric scooters, folding bicycles, etc. Item Type: Electric Bicycle Rear Wheel Hub Motor Material: Aluminum Alloy Installation Location: Rear Motor Wheel Diameter: 26/27.5/28 inches Structure: Gear Drive No Load Speed: 325-245Rpm Rated Power: 350W Load Speed: 290-205Rpm Maximum Torsion: 45N.m Efficiency: ≥80% Colour: Black Noise: <55dB Operating Temperature: -20 to 45℃ Brakes: Disc brakes Open File Size: Approx. 135mm/5.3in Maximum Outer Diameter: Approx. 158.5mm/6.2in Outlet Position: Right out of the central axis Outlet length: Approx. 200mm/7.87in Gear Shift: Flywheel 6/7/8/9 speed Spoke specification: 36H x 13G 1 x Motor 1 x Cable 19 x Accessories