700c, 27-Inch & 650c

Whether you are cutting through mud, dancing on icy, frozen trails or exploring dusty desert roads, you will feel the efficiency of these wheels. CR 1600's are ready to attack the challenges you put in front of them. - 350 based Spline hub - Straight-pull hub and spokes are laced 2-cross - Includes tubeless ready tape and tubeless valve

Designed for the highest speed environments and modern tire widths, the ULTEGRA C60 wheelset shares its all-carbon rim profile with DURA-ACE but employs a hub that is compatible with both 12 and 11-speed cassettes. For situations where aerodynamics is the priority, the new ULTEGRA R8170 C60 wheelset features an all-carbon, 21 mm internal, tubeless compatible rim and a super-fast cup and cone bearing hub that is compatible with both 12 and 11-speed cassettes. - 60 mm height full carbon rim - Internal rim width: 21 mm - Shared rim profile with R9200 DURA-ACE wheels - Improved aerodynamics

Whether you are cutting through mud, dancing on icy, frozen trails or exploring dusty desert roads, you will feel the efficiency of these wheels. CR 1600's are ready to attack the challenges you put in front of them. - 350 based Spline hub with 18t ratchet system - Straight-pull hub and spokes are laced 2-cross - Includes tubeless ready tape and tubeless valve