Brushed Motor Controller Set, 36V 250W Motor Brush Controller Thumb Throttle Grip E‑bike Brushed Motor Controller and Throttle Grip Kit for 22‑28in Bicycle Specification: Item Type:Bicycle Motor Controller Kit Material: Aluminum Alloy + Metal Color: As Pictures Shown Weight: Approx. 4645g/163.8oz Quantity: 1 Set Engine Parameter: Rated Voltage: 36V Rated Power: 250W Flying Wheel Teeth: 16 Teeth Rated Speed: 330rpm Reduction Ratio: 9.78 Controller Style: Brush Controller Parameters: Rated Voltage: DC36V Rated Power: 250W Undervoltage: 20±0.5V Current: 21±1A Diversion: 1-4 V Product Size: 8.5x 6.8cm/3.3x2.7in Suitable For: 22‑28 inches/56‑72cm Ordinary Bicycle Package List: 1 x Controller 1 x Motor 1 x Bracket 2 x Throttle Grip 2 x Brake Cable 1 x Chain 2 x Key 1 x Flywheel 3 Bag x Accessories Combination Note: 1. Manual measurement, please allow 1‑2cm error, thank you! 2. The picture may not reflect the actual color of the project due to the differences between different displays. 3. This product does not contain batteries or chargers. 4. This is our electric universal bicycle kit, this kit mounts the sprocket on the spokes, so it fits most bicycle wheels. 5. The motor uses a flywheel, so when the wheel rotates, the motor does not rotate like a normal bicycle, which can reduce drag.