The Titan 550 is a 21-turn fan-cooled 550 size motor capable of handling 14.4 volts.This powerful motor has a 30% longer armature than a standard 540 size motor for extreme monster torque.Traxxas Titan 550 Motor (23T/14 Volts) - E-MaxxThis is the Replacement Titan 550 Motor for the Traxxas E-Maxx Truck.The Titan 550 is a 21-turn fan-cooled 550 size motor capable of handling 14.4 volts.This powerful motor has a 30% longer armature than a standard 540 size motor for extreme monster torque.FEATURES: Fan-cooled 23 turns 14 voltLength to end of armature: 78mm (3.07") Diameter of can: 37mm (1.46") Length of motor leads: 75mm (2.96") Shaft diameter: .125"