Equip your semi truck's wheels to be Ready for the Road Ahead , with the Stemco 6-Hole Hub Cap, a key component that protects against oil, debris, and dust. To prevent damage to a wheel's lug nuts, bolts, and axles, this removable hub cap attaches to the frame to guard against roadside materials. Fashioned with durable metals and an ergonomic design for an easy-to-install or remove process. FleetPride is your First Click in Heavy Duty .