The DURA-ACE groupset is the result of Shimano's ongoing passion for technology. This is reflected in every single component in the groupset. All components are joined together to work as one, reinforcing each other for unparalleled performance. This is how DURA-ACE achieves ultimate supremacy.
Hydraulic Dura Ace Di2 disc brake set consisting of ST-R9180 shift and brake levers as well as BR-R9170 Flat Mount calipers.
Dura Ace Di2 ST-R9180 STI
Electronic Dura Ace Di2 Dual Control Levers 2x11-speed - especially for time trial and triathlon bars. The switching operation can be initiated with the hands on the brake lever. The ST-9180 provides switching from several positions and during braking. The lever is made of carbon and offers reach adjustment. A single button on each side of the shift lever is designed to work with Synchro Shift. Each switch is available with multi-shift on/off. Integrated E-TUBE cable and internal brake cable routing ensure for enhanced cockpit aesthetic and aerodynamics.
Dura Ace BR-R9170 Hydraulic Flat Mount Disc Brake Caliper
The all-new DURA-ACE hydraulic disc brake caliper was redesigned for the highest level of road performance. Utilizing a lightweight and minimalistic Flat Mount design, the R9170 caliper features stopping power ideally tuned for road applications. The new RT900 rotor offers even greater heat management capability than Shimano's SM-RT99 industry-leading ICE TECHNOLOGIES FREEZA rotors, resulting in unparalleled braking performance and reliability in the most demanding conditions