DT Swiss ARC 1100 DiCut Aero Disc Rear Wheel - 700 12 x 142mm Centerlock HG 11 Road/XDR Black. Excellent aerodynamics and safe steering behavior for a decisive competitive advantage; the ARC 1100 DiCut wheels are made to go flat out fast. Drag and steering movements are reduced thanks to the AERO+ rim thats been aerodynamically optimized by Swiss Slide- these high-end quality wheels are ready to win.DiCut aero hub with 36t ratchet system SINC ceramic bearings and superlight freehubDTs SINC ceramic ball bearing system is made from silicon nitride (Si3N4) an extremely tough and wear- and corrosion-resistant ceramic materialBearing rings are made from a specially developed steel alloyIncludes Shimano HG11 Road and SRAM XDR drivers