Description:This device is installed between the vehicle's hub and the wheel.The hub ring fills in the gap between the vehicle hub and the center bore of the wheel.Ensures a precise fit between your wheel and the hub.Designed to eliminate unwanted steering wheel vibrations.Precision machined to stop vibrations and ensure a snug fit every time.How to chose the hub ring?Hub rings are sized by using two different numbers that are measured in millimeters.The smaller of the 2 measurements such as 57.1mm is the inner diameter. This should match your vehicle's hub bore.The larger of the 2 measurements such as 72.6mm is the outer diameter. This should match your wheel's center bore.Notes:The outside diameter of the spigot ring should fit the wheel's center bore in the back of the wheel.