The Grail CB7 is one of the lightest road wheelsets ever made; thanks in large part to its purpose-built 300g carbon rim. Designed to take full advantage of disc brakes and tubeless tires; the incredibly short sidewalls of the Grail CB7 put material only where it s necessary; lowering weight and enhancing ride quality. The result is outstanding acceleration and a serious advantage on climbs.Incredibly light 300g rim design optimized for tubeless tires and disc brakesRiACT rim shape and carbon lay-up absorbs vibrations to give you the best ride possible21.6mm internal rim width for more stability and control with all tiresTubeless ready with rim tape and valves installedQuick-engaging, lightweight Neo hubs with SpeedsyncSapim Laser J-bend spokes with Secure Lock alloy nipplesPatented BST tubeless rim inflates easier and offers a more secure tire fit-