Feature: 1. Fine Workmanship: The aluminum alloy wheel ring is selected and well processed, effectively enhances the edge of the wheel ring, strong bearing capacity and high functionality. 2. Application Scope: Suitable for the installation of rear drive type flywheel, mainly used for electric bicycle, electric scooter, folding bike, wheelchair, light electric four wheel and so on. 3. More Riding Fun: Suitable for modification, easy to maintain, electric bicycle moped mountain bike modification conversion motor, high efficiency, greatly improve the fun of riding. 4. Wide Temperature Range: Has a large operating temperature range of from ‑20° to 45°, suitable for all situations and almost can be used for every season. 5. Motor Only: The package contains only one rear drive motor, other accessories need to be prepared by yourself, please make sure you are clear about this to avoid inconvenience. Specification: Item Type: Bike Rear Wheel Motor Material: Stainless Steel + Aluminum Alloy Color: As Picture Shown Application: Wheel Size: 16in/20in/24in/26in/27.5in/28in/29in/700C Gross Weight: Approx.7250g/16.0lb Rated Voltage: 48V Rated Power: 1500W Speed: About 45-55km/H Speed: 414-487 RPM Torque (N.M): 71-74.6 N.M Opening Size(Mm): 135-142mm/5.3-5.6in Matching Controller Current: 35A Rims: P25D Torque Arm: M14 Applicable Brake Disc: 160mm/6.3in Brake Type: V Brake Position: Rear Drive Motor Structure: Brushless Wheel Hub Motor Magnetic Steel Height: 35H Magnetic Poles Number: 46 Operating Temperature: -20°-45°. Package List: 1 x Motor Note: Only suitable for high power motor modification, for products with the same interface with the same voltage.