[Powerful Brushless Motor]: Electric bicycle rear wheel conversion kit features 36V 250 brushless and gearless hub motor for efficient running; fit for any 27.5 bicycle frame, easily convert your bicycle to electric bike and. Suitable for regular bicycles used on commuting and short journey. [Pedal Assist System]: 8 points high effective Pedal assist system (PAS) for sensing your pedal cadence and allowing you to ride electric bike comfortably without pressing the throttle on the handlebars, can avoid uncomfortable wrist positions and easy to pedal with less fatigue, great for a long-distance journey. [Durable & Convenient]: Aluminum alloy frame for durability and stability, can support a heavy weight up to 220 Lbs; drive system without moving chains or gears for anti-friction; GD01 operation panel for displaying riding information such as battery power and riding speed. [Safe & Environmentally-Friendly]: Brake levers for cutting off the power and braking when riding, can ensure riding safety; CE certificated for quality and safety assurance; battery powered design for environmental protection. 36V 250W Motor Kits. Wheel Size:27.5. Motor Type:Brushless Gearless hub motor. Wheel Bottom Bracket:Front:100mm Gear:135mm. Rated Efficiency (%):? 80. Waterproof grade (IP Grade):IP65. Gross Weight: 8.0kg. 27.5 inch: 626224cm.