Description: Rebuildable with an easily accessible commutator and replaceable brushes and springs High strength magnets for unmatched brush-motor performance Specifically designed for R/C vehicles that require precise movement control Excellent torque and long-run times, dual-ball bearing design Include 1pc 540 brushed motor, 1pc 60A ESC Specification: Product name: 540 Brushed Motor Suit for: 1/10 RC Cars Material: Metal Outer diameter: 36mm Total Length: 57mm Shaft diameter: 3.17mm Motor shaft length: 12mm Turn: 21T(20000 RPM)/35T(12000 RPM)/45T(10000 RPM)/55T(8000 RPM) /80T(5400 RPM) (optional) Input Voltage: 7.4v Max. Input Voltage: 12V No-load current1.4A Package Includes: 1pc 540 Brushed Motor 1pc 60A ESC Note: 21TTSuitable for drift cars, high speed requirements of the sports car 35T/45TSuitable for CC01/F350/D90/RC4WD and other simulation off-road jeep models. 55T/80TThe output torque of this kind of motor is large,Suitable for climbing class of strong climbing car The motor is fully waterproof, and can be used in water for a long time. But after wading, you need to pay attention to three maintenance points: 1.Be sure to maintain the motor bearings with lubricating oil immediately. 2.Be sure to blow dry the moisture between the copper head and the carbon brush as soon as possible. Don't let it air dry. 3.The plugs on the ESC and motor should also be blown dry as soon as possible.