1Precise style can achieve maximum energy conversion. The rotor is precisely balanced, smoothness improves reliability and maximum speeds. 2High purity copper winding maximizes efficiency, high-strength magnets provide stable brush motor performance. 3Excellent torques and long life, direct welding wiring guide, providing flexible welding options. 4540 brush motor, high torques is used for drifting of climbing car and large foot car, strong magnetic force of bidirectional bearing, small heat generation and large power. 5The carbon brush can also be changed, because the external carbon brush can work for a long time.Condition: 100% Item Type: RC Accessories Material: Metal and Plastic Color: Black Motor: Speed: 35T, 45T, 55T (optional) Length: Approx. 53mm / 2.1in Diameter: Approx. 36mm / 1.4in Shaft Length: Approx. 12mm / 0.5in Shaft Diameter: Approx. 3.17mm / 0.1in Operating Voltage: 7.2-7.4V Maximum Voltage: 12V ESC: Direct Current: 60A Explosion Current: 320A Power Supply: 2~3S Lithium Battery, Nickel Hydrogen Battery 5~9S BEC: 5V/2A Product Size: Approx. 43 x 29 x 27 mm / 1.7 x 1.1 x 1.1 in (without Cable) No-Load Current: 1.4A Continuous Output Current: 320a (forward), 160a (rear), 270a (braking) 7.2V Voltage No-Load Speed: 35T: 12000rpm 45T: 10000rpm 55T: 8000rpm1 x Brush Motor1 x 320 Brush ESC1. Please allow 1-3mm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.3. Large foot car is recommended to use 35T 45T, climbing car usually recommends 55T.4. The motor supports up to 12V. Recommended battery 7.2-7.4V.