700c, 27-Inch & 650c

The SES 2.3 is purpose-built for going up. Ultra-light, respectfully aerodynamic, and optimized for tubeless tires the SES 2.3 raises the bar for performance through hilly and mountainous terrain. - Front and rear optimzed depths and shapes (27mm front, 32mm rear) - 21mm internal width is optimized for ENVE 27mm tires - Hookless tubeless rim is compatible with 25mm-32mm tires

The all-rounder of the new DURA-ACE wheel lineup, the C50 is both lighter than the previous C40 model and nearly as aerodynamic as the previous C60. It's a wheelset at home in a wide range of conditions. From time trials to criteriums, on rolling terrain or attempting a personal best, the new C50 is the ideal wheel for spirited road riding. The perfect blend of low weight and aerodynamic performance, the all-new DURA-ACE C50 features an updated all-carbon tubeless rim and new hub design that drops weight while enhancing rigidity. - 50 mm height full carbon rim - Internal rim width: 21 mm - DIRECT ENGAGEMENT - Compatible only with Shimano road 12-speed cassette sprockets