Ensure your semi truck's wheels are Ready for the Road Ahead with enhanced protection against oil, dust, and debris, with the Stemco 342 Series 6-Hole Grease Hub Cap. Due to its exterior cover that guards against harmful roadside materials, this removable hub cap is the ideal choice to protect a wheel's lug nuts, bolts, and axles. Engineered with resilient metals and an ergonomic design for an easy-to-install or remove procedure. FleetPride is your First Click in Heavy Duty .