700c, 27-Inch & 650c

From road to gravel, the ULTEGRA RS770 supports wider tires for mixed surface and rough tarmac riding. The tubeless carbon laminate rims are complimented by CENTER LOCK disc brake hubs, providing confident braking in all conditions. Efficient acceleration - High drive rigidity - OPTBAL Lightweight and durable - Carbon laminate rim - Road tubeless Stability - Higher rigidity - Road E-THRU axle Easy maintenance and installation - Simple handling and workability - CENTER LOCK mount

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

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

With a shallow-depth aero profile and lively acceleration, the ULTEGRA R8170 C36 wheelset is a climber's delight that delivers performance every road rider will appreciate. With the speed and efficiency of tubeless tires, the everyday performance of a shallow, aero profile carbon rim, and the convenience of 11 and 12-speed compatibility, the new ULTEGRA R8170 C36 wheelset is an upgrade for any road bike. - 36 mm height full carbon rim - Internal rim width: 21 mm - Shared rim profile with R9200 DURA-ACE wheels - Improved aerodynamics