105 Front+Rear Set Disc Brake BR-R7170 + Di2 ST-R7170

The Shimano 105 BR‑R7170 front and rear disc brake calipers paired with ST‑R7170 Di2 shift/brake levers provide hydraulic disc braking for 12‑speed road groupsets. Flat‑mount aluminium calipers feature two pistons, sintered pads, 140 mm rotors and are compatible with Dura‑Ace and Ultegra.

The Shimano 105 disc brake set combines the BR‑R7170 flat‑mount calipers with the ST‑R7170 Di2 shift/brake levers for a fully hydraulic, electronic road braking solution. Each caliper is a two‑piston aluminium unit designed for 140 mm rotors and uses sintered metallic pads that offer consistent performance in wet and dry conditions. The flat‑mount design matches the geometry of modern road frames and aligns with Shimano Dura‑Ace and Ultegra brake compatibility. The ST‑R7170 levers integrate Di2 electronic shifting for a 12‑speed drivetrain, providing precise, semi‑wireless gear changes while retaining hydraulic brake control. The system includes the required hoses and connection hardware, and the levers feature adjustable grip width for ergonomic hand positioning. Overall, the set delivers reliable stopping power, quiet operation, and straightforward maintenance through Shimano's One‑Way Bleeding procedure, making it a practical upgrade for 105‑based road bikes.

• Flat‑mount aluminium calipers with two pistons
• Sintered metallic brake pads for consistent performance
• 140 mm rotor compatibility
• Di2 electronic shift/brake levers for 12‑speed groupset
• One‑Way Bleeding system simplifies maintenance