UberTechnic Hubcentric Rings - 64.1mm ID to 66.1mm OD - Billet Aluminum Hubrings - Only Fits 64.1mm Vehicle Hub & 66.1mm Wheel Centerbore - Hub Centric Centering Rings (Pack of 4) [QUALITY] Authentic UberTechnic Hubrings 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] 64.1mm (Vehicle Hub needs be this Size) [HUB RING OUTER DIAMETER] 66.1mm (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.