Description: Surpass Hobby newest ROCKET 540 V4S Sensored Brushless Electric Motor, Modified 4.5T Model Double color hollow design, made from 7075 aluminum alloy, 145g extremely lightweight Dual sensor port, removable/replaceable rotor, compatible with any sensored & sensorless ESC Available for F1, 1/12, 1/10 RC Buggy, Drift and Touring Cars IFMAR, ROAR, BRCA, EFRA Compliance Specification: Model: Rocket 4.5T Design: Sensored Watts: 490 Lipo(S): 1-2S Max Amps: 108A Rotor Poles: 2 IO(7.4V): 6.5A Resistance: 0.0042 Turns: 4.5 Rotor: Ø12.5xØ5 KV(RPM/Volt): 7800 Shaft: Ø3.175mm Type: Modified Size Chart: Size: approx. Ø35.8 x 52.1mm/1.41 x 2.05inch Package Includes: 1 Piece ROCKET 4.5T 540 V4S Sensored Motor