Feature: 1. 3 MODES: Electric bike hub motor has 3 built in riding modes. Pure human power mode 0 percent: pure pedaling, sweat and fat loss. Power mode 50 percent: more relaxing and energy saving riding. Pure electric mode 100 percent: no need to exert effort. Can meet your different needs. 2. EASY TO MAINTAIN AND MODIFY: The opening size of the rear wheel base needs to be 142mm. Electric bikes, power assisted bikes and mountain bikes can be converted to electric motors. This electric motor has high efficiency, which can greatly improve the riding fun. 3. WATERPROOF AND DURABLE: Electric bike wheel hub motor has IP65 waterproof rating. Aluminum alloy edges are processed with fine technology to effectively strengthen the edges and make it lightweight. It has strong carrying capacity and comfort. 4. HIGH PERFORMANCE: This electric bicycle brushless motor has a rated voltage of 36V, a rated power of 500W, and a rated speed of about 32‑35km/h, which can provide you with a superb riding ability and easily convert your bike into an electric bike. 5. PROFESSIONAL CONVERSION ACCESSORY: The brushless gearless electric bike motor is suitable for cyclists who like challenges. You can ride faster and easier on the road or climb hills, which plays an important role in daily life. Specification: Item Type: Electric Bike Hub Motor Material: Aluminum Alloy Opening Size: Approx. 142mm / 5.6in Wheel Size: 20-26 700c Inch Installation Position: Rear Drive Brake: V Brake, Disc Brake Rotate Speed: 289-346rpm Speed: 32-35km/h Magnetic Steel Pole Number: 46. Package List: 1 x Electric Bike Hub Motor