Hubcentric Rings (Pack of 4) - 63.4mm ID to 73.1mm OD - Silver Aluminum Hubrings - Only Fits 63.4mm Vehicle Hub & 73.1mm Wheel Centerbore [QUALITY] Authentic Precision European Motorwerk Hub Centric Rings made of CNC Machined Billet Aluminum [FITMENT] Buyer is responsible for ordering the correct size. It is necessary that you measure your vehicle's hub and your wheel's centerbore before purchasing. See the description section for additional information. [HUB RING INNER DIAMETER] 63.4mm (Vehicle Hub needs be this Size) [HUB RING OUTER DIAMETER] 73.1mm (Wheel Center Bore needs to be this Size) [BENEFITS] Eliminate vibrations caused by your wheels not centering correctly onto your vehicle's hub. Easy to Install.