The Shimano Dura-Ace BR-R9170-R is a rear hydraulic disc brake caliper designed for road bikes using Flat Mount standards, making it suitable for most modern road frames with disc brake compatibility. This caliper comes as a single unit, crafted from lightweight aluminum, and is engineered for riders who value reliable stopping power and ease of maintenance in a range of conditions. The Flat Mount system offers a low-profile installation, reducing frame clutter and improving aesthetics. The caliper features wide pad clearance for easy wheel changes and a one-way bleeding system, which simplifies setup and maintenance—useful for home mechanics or shops. Heat management is boosted by Shimano’s ICE TECHNOLOGIES FREEZA design, reducing brake fade under repeated or prolonged use.