48V 500W Front Drive Motor, Electric Bicycle Conversion Kit Noise Reduction 1:4.5 Reduction Ratio for Cycling(20 Inches). Item Package Dimensions L x W x H. 11.2 x 11 x 10.5 inches. Manufacturing Material: Made of high quality aluminum alloy, copper and ABS materials, strong and, long service life, waterproof connector, do not worry about rainy days. Wide Applicability: Suitable for DIY electric bike, let your ordinary snow become electric snow bike. Brushless Hub Motor: Brushless hub motor, realize noiseless, let you fully enjoy the fun of riding. Front Drive Motor Features: 207-270Rpm rotate speed, 32-35km/h speed, 59-66 torsion, 1:4.5 reduction ratio, 22A matching controller. Simple : Simple to operate, easy to use, easy to install and disassemble. Without any difficult requirements even though you use it for the first time. Manufacturing Material: Made of high quality aluminum alloy, copper and ABS materials, strong and durable, long service life, waterproof connector, do not worry about rainy days. Wide Applicability: Electric hub motor kit, suitable for DIY electric bike, let your ordinary snow become electric snow bike. Brushless Hub Motor: With brushless hub motor, realize noiseless operation, high performance, let you fully enjoy the fun of riding. Simple Simple to operate, easy to use, easy to install and disassemble. How to Use: The interface on the controller is connected to the socket of the accessories to achieve the function. For details, please refer to the wiring diagram and instructions. Specification: Item Type: Electric Bicycle Hub Motor Kit Material: Aluminum Alloy + Copper + ABS Connector: Waterproof Connector Speed: 32-35km/h Rotate Speed: 207-270 RPM Torsion: 59-66 Opening Size: Approx. 135-142mm / 5.3-5.6in Matching Controller: 22A Rims: SC73 Moment Arm: M12 Disc Brake Plate: Approx. 160mm / 6.3in Reduction Ratio: 1:4.5 Motor Structure: Gear Motor Number Of Magnetic Poles: 20pcs Brake Type: Universal Disc Brake KT-LCD5 Controller: Controller Box Size: Approx. 128 x 68 x 38mm / 5.0 x 2.7 x 1.5in Tube: 9 Tubes Maximum Current: 22±1A Rated Voltage: Universal DC 36V 48V Speed Setting: 1-4. Shop with confidence – Thousands of happy customers trust us for quality products and fast service!