Convert your Gravel bike into an electric bike with pedal assist quickly and easily. The system is easily installed by changing the rear wheel and the battery in place of the bottle cage, without altering the bike's aesthetics. The pedal assist sensor is integrated directly into the motor, and the assist control, with its indicator light, is located on the battery cover for convenient and intuitive operation. The range reaches up to 100 km with minimum assistance and 40 km in maximum mode. By deactivating assistance on descents or flat terrain, battery life is significantly increased. They have an extra-wide rim to withstand impacts and accommodate wide tires seamlessly. The rim profile is concave, which improves aerodynamics for maintaining good speed on the road. 180W 4.9Ah 36V lithium battery, with 4 power modes on the battery cover, battery holder and high-speed Pedaltec controller 25km/h included, all weighing 1300g. AKM electric motor with a power of 36V 250W and a torque of 30Nm. Available sizes: 700c Rim material: High Modulus UD Carbon Finish: AIR+PLUS U-Shape Profile Profile: 40mm Inner width: 28mm External width: 33.8mm Tire Compatibility: Clincher, Tubeless Ready Hubs: Vektor Disc ROAD Front / AKM E-Bike Rear Bearings: Steel Braking system: Center Lock Front / IS6 Rear Front axle: 12×100 Rear Axle: 12×142 Hubs: Shimano Spokes: Sapim Race Straight Pull Weight (g): Set 3210 / Rear: 2480 / Battery: 1300 Included: 180W 4.9Ah 36V Lithium Battery, Charger, Controller, UST Valves, Pre-installed Rim Tape, Spare Spokes.