Need to move your wheels out for a little extra space This set of black hub - centric 1 in. (25 mm) wheel spacers from Rugged Ridge has a 120 mm bolt pattern and 64 mm center bore. The hub - centric construction ensures the wheel is precisely centered on the axle, minimizing stress on wheel studs, and eliminating the added road vibration common with non - hub - centric designs. Installing these spacers will help fit wider tires, giving your vehicle a wider track and improved stability. Constructed of double anodized extra thick 6061 - T6 aluminum for long life and extra corrosion resistance. All hardware is grade - 8 for extra strength.