Mid Drive Motor Kit with ND72680 Controller 350A 680A Line Communication for QS138 90H V3 4KW 7200rpm with 1:2.35 Gear Box

controllerE-motorcycle weight approx 180kg+1*70kgSpeed: peak 120km/hGear ratio: 1:2.35Climbing slope: 20°@30kph@250kgTire: 100/70-19One set including below kits:1.1pcs X QS138 4000W V31:2.35 gear ratio Mid Drive Motorwith 15T sprocket2.1pcs X ND72680 Controller with USB cable3.1pcs X DKD Speedometer 4.1pcs X Z6 ThrottleKey Features1). Simplify to make a electric-motorcycle. Gearbox transmission shaft clutch are no need.which save space.2). It could be installed in the rear to save more space for battery.3). Support regenerative braking4). High efficiency: 85~90%.Wheel tire size: 130/70-12.Pole Pairs: 5.Gear Ratio: 1: 4.77.Voltage: 72V (20s Lithium battery)

• controller
• High torque output: amplified torque through gear reduction suitable for steep slopes mountains and other complex terrain
• Modularized design: motor controller and sensor are highly integrated and the parts can be replaced separately during maintenance.
• Compatible with a wide range of vehicles: can match vehicles with different wheel diameters and tire types.
• High stability: The motor is located in the middle of the vehicle to improve driving stability especially suitable for high-speed riding or off-road scenarios.
• Wide applicability：It is suitable for DIY electric scooters electric bikes E-Motorcycle Moped etc.