Hub-centric wheels are designed for the hub center bore of the wheel to be a perfect match to the vehicle. This allows the wheel to be centered on the vehicle hub, which is the most accurate way to center the wheel. Most original equipment wheels are designed to be hub-centric because the manufacturer designs wheels specifically for each vehicle.
As seen in the diagram, the wheel's center bore is exactly the same size as the vehicles hub when you follow the red dotted lines.
As opposed to hub-centric wheels, lug-centric wheels are centered on the vehicle using the lug holes. Most aftermarket wheels are lug-centric because this allows the manufacturer to make the wheels with larger hub bore diameters so that the wheel can fit a wider array of vehicles. Manufacturers make the center bore larger because a center bore that is smaller than the vehicle hub will not be able to secure safely to the vehicle.
As seen in the diagram, the wheel's center bore is slightly larger than the vehicle hub when you follow the red dotted lines.
Hub-centric rings (hub rings) can be installed on lug centric wheels. A hub-centric ring is a plastic or metal ring that sits inside the hub bore of the wheel, filling the gap between the hub bore in the wheel and the vehicle hub. Hub rings essentially make lug-centric wheels hub-centric. While hub-centric rings are not required, they can help eliminate any high speed vibrations by simply creating a seemless bond to your vehicle.
As seen in the diagram, the yellow ring fits in the hub bore of the wheel and perfectly sits on the vehicle hub when you follow the red dotted lines.
If you have any questions or require any assistance, stop by any of our America's Tire locations and we'll get you taken care of!