Arch CB7 rims feature Stan s patented Bead Socket Technology; the original tubeless-ready rim design that; combined with Stan's sealant; has become the foundation of all current tubeless-ready systems. You see a lot of low sidewalls out there these days; but only Stan s BST rims feature the ultra low sidewalls and unique interior rim shape that makes Stan's tubeless technology stand out.Designed for trail riding and enduro racingRiACT carbon layup and rim shape absorbs impacts and rolls fasterPatented Bead Socket Technology for easier tubeless inflation and more reliable sealLow-profile sidewalls promote proper tire shape and shed unneeded rim weightWideRight rim design optimized 2.25 - 2.50 tiresCustom decal kits available to match most bikes2-year warranty and lifetime crash replacement with registration-