UberTechnic Hubcentric Rings - 56.1mm ID to 57.1mm OD - Billet Aluminum Hubrings - Only Fits 56.1mm Vehicle Hub & 57.1mm 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] 56.1mm (Vehicle Hub needs be this Size) [HUB RING OUTER DIAMETER] 57.1mm (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.