3660 2200KV 2-4S Brushless Motor For RC Sensorless ESC 1/8 Buggy 1/10 Truck 4S August 18, 2024 admin This Is 3660 2200KV 4 Pole Sensorless Brushless Motor With 5mm Shaft. Those specially version motors have upgrade bearing and specially rotors to handle higher speed and great torque. Type : 4 Pole Sensorless. Max voltage: 2-4S Lipo.