Features 1、High purity copper winding, durable sealed bearing, low friction, low noise, and long lasting time. 2、Important remote control car accessory, suitable for TRAXXAS, for HSP, for REDCAT RC car model. 3、Precise balanced rotor, high smoothness, good stability and excellent performance, convenient remove and replace. 4、540 Motor with large torsion, bidirectional bearing with strong magnetic force, small heat, large power. 5、Excellent torsion and long life, direct welding wire guide, providing flexible welding options. Exquisite workmanship to meet your precise motion control needs. Item Type: Motor Material: Iron + Copper Color: Green Teeth: 20T Length: Approx. 50mm / 1.97in Diameter: Approx. 36mm / 1.42in Shaft Length: Approx. 12mm / 0.47in Axle Diameter: Approx. 3.175mm / 0.13in 20T: No-Load RPM 7.2V: 20000 + 10%, 2AMP current Rated Load RPM 7.2V:18400 + 10%, 7.92AMP current Compatible: Fit for traxxas Fit for hsp Fit for redcat Installation method: The red line is welded to the positive pole and the black line is welded to the negative pole. The motor is connected to the ESC (excluding) and installed to the car after it is energized. Note: 1. You cannot simply push the pinion all the way to the motor shaft, because doing so will push the shaft slightly into the motor, and you will need a little extra shaft space to engage properly. 2. Do not overtighten the thread on a pinion. 3. Please allow 1-3mm error due to manual measurement. Thanks for your understanding. 4. 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. Package List 1 x 540 Brushed Motor 2 x Connection Cable