These anodized aluminum wheel adapters convert your bolt pattern from 5 on 4.5 to 5 on 5.5 and move your wheels out 1.375 inches to help fit wider tires and give your vehicle a wider track and improve stability. Constructed of double anodized black extra thick machined aluminum for long life and extra corrosion resistance. All hardware is grade-8 for extra strength.. This pair of 1.375 inch black aluminum wheel adapters from Rugged Ridge converts a 5x4.5 inch to a 5x5.5 inch bolt pattern.