SURPASS HOBBY Rocket-RC Brushless Motor 1/10 F540 550 motor 3.175mm Shaft V2 Supersonic w/Temperature Sensor for Tamiya RC Car. Surpass Hobby Brushless Motor:SURPASS HOBBY Rocket-RC V2 Supersonic Brushless Motor F540 3100KV /3600KV /3930KV /4370KV ,F550 3000KV /3350KV /3800KV /4500KV with temperature sensor, 48DP 21T gear, 3.175mm shaft.
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