Aluminum HubCentric Wheel spacers are designed to space the wheel away from the car on larger tires. The bolts in the wheel spacers match the holes to the tire hub, and come with studs that secure the spacers to the wheels. The bolts through the wheel spacers are also called studs. These studs are what hold the wheels onto the vehicle. The studs are mounted to the disc hub/brake drum.
In this arrangement, the wheels and the spacers are fitted together compactly, as if they were one solid unit. When you fit the wheel onto the studs, place a lug nut over each stud, and then tighten them with a wrench. This secured arrangement allows for even, level driving on all four tires, without the risk of the tire or spacers flying off. If you're doing off-road driving, install wheel spacers for a smoother and safer off-road driving experience.