Key Features: 4-POLE 12-SLOT design boasts exceptional EFFICIENCY and produces LESS HEAT Oversized gold plated solder tabs for LESS RESISTANCE and easy soldering QUIETSENSE Technology shields magnetic field noise generated from the motor coils and keeps motor and ESC in sync at all times HIGHER PRECISION and MORE EFFICIENT startups OPTIMIZED design eliminates the need for mechanical timing adjustments Sensor alignment method delivers uniform timing and torque in both directions, automatically REBUILDABLE design allows users to replace front end bell with bearings or rotors with shaft ROAR standard sensor port and labeled connections High strength 180°C neodymium sintered magnets High quality, temperature-stabilized sensors High-purity, high-temperature copper windings Hardened stainless steel shaft 13 AWG high strand wire with silicone insulation Kevlar wrapped rotor 6061-T6 Billet aluminum heatsink can High RPM NMB oversized bearings High quality 0.2mm steel laminations Low resistance gold plated bullet connectors Overview: For more than a decade Castle has been providing award winning brushless sensorless motors to R/C enthusiasts worldwide. In response to overwhelming requests by our customers, we have brought technological advancements together that will deliver unprecedented performance in our new SENSORED motor Line. Drivers in all applications demand clean starts when coming off the line. Crawler fans require high-precision low speed control and torque for climbing, racers need precision and predictability, and dragsters don"t have a millisecond to spare. Sensored brushless motors always know the position of the rotor, which eliminates cogging during the startup condition