A wheel assembly having a motor attached to a hub within the wheel assembly such that the motor powers the wheel assembly to rotate about an axle once the motor receives a predetermined amount of power. A battery system is configured to deliver power to said motor, the battery system is arranged to rotate with the wheel assembly. A sensor system within the wheel assembly that provides data to a control system related to velocity and angle of orientation of the assembly. A load transferring quick-release mechanism is also disclosed for coupling the wheel assembly to a vehicle wheel attachment frame member and a method is provided for calibrating the same.