Description: The Waterproof 540 8.5T Sensored Motor Brushless will provide more power and longer run times with its high efficiency?let your car challenge the muddy road Sensor-based for excellent torque and low-speed driveability,Compatible with any sensored/sensorless ESC,Meet IFMAR / ROAR rules High RPM precision bearings,CNC machined billet T6 aluminum heatsink can,High purity copper windings maximizes conductivity High power solder tabs,Removable/Replaceable rotor,Powerful sintered neodymium magnet,Precision engineered for maximum energy conversion. Suit for for 1/10 RC Car Truck Crawler Boat. Specification: Item name: Sensored brushless motor Size: 540 Battery: 1-3S LiPo battery Sensored: Yes Max current: 80A Resistance: 0.0138 Watts: 340 Turns: 8.5 KV: 4100KV Shaft diameter: 3.17mm Material:Aluminium alloy Color:Blue Size Chart: Size:36 x 50mm Package Includes: 1 X 540 8.5T 4100KV Waterproof Sensored Brushless Motor 1 X Sensored wire