Crawlmaster 2n1 Brushless Crawler System 1800kv/2300kv The Holmes Hobbies Crawlmaster 2n1 features our custom brushless 10 pole inrunner stator and large diameter high strength rotor for maximum torque and rpm control, ultra compact 50mm long aluminum element sealed housing, beefy bearings, and integrated ESC for plug and play fun! Our exclusive 10 pole 12 slot magnetics are designed for rock crawlers and scale trucks, dominate the trail like never before! The Crawlmaster 2n1 is shorter than other 2n1 motors, but does not sacrifice power or torque! It has a full 540 class stator that we designed compact, dont let the short case fool you! We use the highest quality materials mated with our latest magnetic designs, so this system is made for competition yet suitable for your longest trail sessions too! Features:2n1 motor with ESCPerfect for 1/10 crawlers and scale trucksMassive 21mm diameter high torque rotorCompact and lightweight waterproof inrunner designPrewired with XT60 plug and JST for accessory powerAux wire drag brake controlUltra smooth startupComes with AM32 firmware installed and tunedIncludes USB programmerSpecifications:Type: 540 Sensorless Brushless Inrunner with integrated 40 amp ESC5 amp 7.4v BECkV Rating: 2300Input Voltage: 2-4SSlot: 12Pole: 10Length: 50mmDiameter: 36mmweight: 154gShaft diameter x length: 3.175mm x 15mmNo load Current: 2.2a at 10vTerminal Resistance of motor: 19.2mOhm 1 year warranty from date of purchase. Does not include damage from overheating, overgearing, rust damage, or improper installation. We recommend dielectric grease applied on the output ball bearing to minimize water seeping between the bearing/ shaft interface.