Trans-Dapt Performance Products' Billet Wheel Adapters are milled using durable, lightweight 6061-T6 Aluminum. These adapters allow you to change the vehicle's lug count and bolt circle diameter. All spacers are 1-1/4" Thick! All wheel adapters and spacers are sold in pairs.Trans-Dapt Billet Wheel Adapter 3617 5 x 5.5 in. Hub - 5 x 4.75 in. Wheel - 7 in. Dia - 1.25 in. Thick - 78 mm CenterDurable Lightweight 6061-T6 Aircraft AluminumHeavy Duty For Truck SUV And Competition UsePre-Installed Press In StudsRadiused Edges Reduce Stress On SpacersIncludes Zinc Plated Open End Lug NutsStreet Performance USA offers Trans-Dapt Performance Products Billet Wheel Adapter 3617 at low everyday prices. Be sure to check out all of the products from Trans-Dapt Performance including Trans-Dapt Wheels and Tires, Trans-Dapt Wheel Parts and Accessories, Trans-Dapt Wheel Adapters.