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 lightweight Dura-Ace C40 Carbon Tubular wheelset is the ultimate all-rounder. Yet, it’s still aero thanks to the wide rim you’ll see at the C40. This carbon wheelset has an increase in rigidity for improved aerodynamic performance, while maintaining a comfortable riding experience. Its braking, handling and acceleration are top notch. - Responsive acceleration - Wide section rim - Carbon laminate rim