Shimano BR R9170 Brake Caliper - Front

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. 

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.