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. All-round tubeless wheels with balanced aerodynamics and lightweight materials 50 mm height full carbon rim Internal rim width: 21 mm FRONT REAR Weight 674g 787g Brake Type Centerlock Centerlock Axle Size 100x12 142x12 Rim Height 50mm 50mm Spokes 24 24 Tyre Size 700 x 25-32 700 x 25-32 Tyre Type Tubeless Tubeless Rim External Width 28 28 Rim Internal Width 21 21