ARC Carbon Rims take notes from our Next R carbon wheelset; built to handle the most challenging days on the trail. The ARC has been redesigned to take full advantage of the benefits carbon fiber has to offer. Featuring a generous internal width for modern tire widths with lower pressures. Lace these rims to your favorite hub and youa (TM)ve got a world class wheelset ready for action.UD Carbon fiber construction4.5mm Offset - Improves spoke tension balance and wheel stiffnessCompatible with standard external nipples (sold separately)