4 pole 12 slot high-torque motor design.
CNC machined 6061 T6 billet aluminum heatsink can.
3.175mm shaft diameter.
High purity copper windings maximizes efficiency.
Precision engineered for maximum energy conversion.
The 3650 3900KV sensorless motor comes with brushless 60A ESC. The high performance 3650 3900KV waterproof brushless motor is designed to provide both quality and performance at an affordable price. Waterproof function motor let your car challenge the muddy road. It is built from high quality aluminum alloy which is produced from the latest CNC milling machines, and is designed with high power and rotation speed to provide longer run time for 1/10, 1/8 RC car truck. Features: 4 pole 12 slot high-torque motor design. CNC machined 6061 T6 billet aluminum heatsink can. 3.175mm shaft diameter. High purity copper windings maximizes efficiency. Precision engineered for maximum energy conversion. Precision balanced rotor, smoothness for best reliability and maximum RPM. More economical to make a combination sell of motor and ESC, customers no need to choose them separately. Suit for 1/10, 1/8 scale RC car. Specifications: Motor Specifications: Brand name: SURPASS Watts: 900W Max voltage: <13V Max amps: 69A KV(RPM/Volt): 3900KV Max RPM: 50000 Diameter: 36mm Length: 50mm Shaft length: 15mm Shaft diameter: 3.175mm Mounting hole: M3 Plug type: 4mm golden banana plug ESC Specifications: Item name: Waterproof ESC Continue current: 60A Burst current: 360A Battery: 2-3S Lipo / 4-9S NiMH BEC output: 5.8V / 3A Power supply plugs: T plug male Package Information: Package size: 14.5 * 8.6 * 5.3cm / 5.71 * 3.38 * 2.09in Package weight: 344g  Gift box package Package List: 1 * 3650 3900KV motor 1 * 60A ESC 2 * User manual