Abstract: A modular motorized wheel system is provided for replacing a conventional wheel of a conventional skateboard. The wheel is retained on the axle of the skateboard by an end nut removably attachable to the outside end of the axle. The system includes a motor shaft having an axial bore therethrough. The bore is sized to make the motor shaft concentrically and removably mountable on the axle. The motor shaft has an exterior end formed in an open cylindrical shape, the exterior end including an axially displaced shoulder sized to receive and abut the end nut, by which the motor shaft is secured on the axle. Other embodiments are provided.

Abstract: A modular motorized wheel system is provided for replacing a conventional wheel of a conventional skateboard. The wheel is retained on the axle of the skateboard by an end nut removably attachable to the outside end of the axle. The system includes a motor shaft having an axial bore therethrough. The bore is sized to make the motor shaft concentrically and removably mountable on the axle. The motor shaft has an exterior end formed in an open cylindrical shape, the exterior end including an axially displaced shoulder sized to receive and abut the end nut, by which the motor shaft is secured on the axle. Other embodiments are provided.