Rim center caps are cosmetic covers affixed to the center hub of a wheel, concealing lug nut assemblies and the wheel mounting surface. They are typically constructed of plastic or metal and secured via friction, retaining clips, or dedicated fasteners. Center caps often integrate the vehicle manufacturer’s logo or wheel style designation. Precise fitment is critical, dictated by wheel diameter and lug pattern. Variations include embossed or painted finishes, and some designs incorporate theft-deterrent features. They contribute to wheel aesthetics and protection from debris ingress.