a wheel cover mold assembly is provided for all wheel cover styles of a particular wheel diameter and mounting system . the mold assembly includes a top and a bottom base . the top base carries a mold cavity plate and the bottom base carries a mold core plate . the mold cavity plate and mold core plate include cavity surfaces defining the configuration of a specific wheel cover . the bottom mold base additionally includes a core retainer plate , inserts and / or cores which define , in cooperation with the mold core plate , mold cavity portions for a wheel cover mounting system common to various wheel cover styles . if the mounting system comprises an annular grip ring , for example , the inserts or cores cooperate with the core plate to form a grip ring receiving channel on the inner face of the wheel cover . if the mounting system includes individual mounting clips , the mold inserts configure the mold cavity for clip receiving sockets which project axially from the inner face of the wheel cover . for a wire band mounting system , cam face inserts are configured to define axial leg arrays which carry a wire band .