The present disclosure is directed to a wheel cover that is coupled to a wheel of a vehicle utilizing a mounting assembly that has a bearing block. A retainer assembly in combination with the bearing block of the mounting assembly allows the wheel cover to be coupled to the wheel in a manner such that the wheel cover does not rotate with the forward and backward rotation of the wheel when the vehicle is being driven. The wheel cover covers the wheel and partially covers a gap or space between a tire of the wheel and a fender of the vehicle, which increases the aerodynamic performance of the vehicle. The retainer assembly provides at least one degree of freedom such that the wheel cover may move with the wheel when steering the vehicle in a leftward direction and a rightward direction.