The best skating experience is only when you have the best wheels on your skates. These premium Endless wheels are made in the USA with a high-performance urethane formula that delivers an enhanced experience balancing speed, wear, grip, and sliding performance. The 68 mm wheel has been specifically developed for the Arc CS 5-wheel frames, which require 4x68 mm wheels and it offers incredible grip when on deep edges which makes it excellent for 5-wheel wizard skating and slalom skating. The relatively large core increases overall wheel stiffness and speed.