An aerodynamic disk-shaped wheel cover (1) having a central aperture (3) and at least two pair of attachment slots (6) about a periphery of said cover. A method of attaching the cover to a wheel is provided by ties (7) through the slots is provided. The wheel cover is size adjustable to fit varying sizes of wheels by providing a slit (4) extending from a periphery of the central aperture to a circumference (9) of the cover.