Front hydraulic disc brake and lever. For 2 speed rear derailleur.
Lever: Shimano's new ULTEGRA ST-R8170 brake levers bring enhanced modulation and control to every ride by employing Shimano's proven SERVO WAVE technology. The all-new Di2 platform, used on both DURA-ACE and ULTEGRA, untethers the shifters while delivering our fastest, most reliable wireless shifting. Your time on the bike is precious, let Shimano make it even better.
Clean Cockpit: Wireless connection enhances the aerodynamic effect and easy maintenance
Unparalleled ergonomics engineering refined with pros' feedback
Raised hood peak improves ergonomics
Optimized brake control
Lighter, smoother lever action
Enhanced modulation thanks to an expanded braking control area
Compatible with wired and wireless connection
Available to additional satellite shifters
High electronic energy efficiency
1.5 to 2 years of battery life with easy-to-change CR1632 shifter batteries (Initial shifter batteries may have a shorter battery life than stated above.)
Average weight: 391 (g/pair)
Brake: The ULTEGRA R8170 disc brake caliper brings a new level of control to the road cycling world with enhanced modulation and a quicker initial braking point. Despite its smaller construction, the system is quieter than ever and easier to maintain.
10% wider pad clearance decreases brake noise
Maintenance-friendly bleeding process
Brake hose (kit): SM-BH90-JK-SSR
Hose joint: Straight
Pad: K05S-RX Resin (w/o fin), L05A-RF Resin (w/ fin), L04C-MF Metal (w/ fin)
Recommended disc brake rotor: RT-MT800 RT-CL800
Mount type: Flat mount
One Way Bleeding
Piston: 2
Average weight: 123
