Your time on the bike is precious, let Shimano make it even better. Ultegra ST-R8170 brake levers bring enhanced modulation and control to every ride by employing Shimano's proven SERVO-WAVE technology. The Di2 platform untethers the shifters while delivering fast and reliable wireless shifting. The BR-R8170 hydraulic 2-piston disc brake caliper brings a new level of control to the road cycling world with improved modulation and a quicker initial braking point. Despite its smaller construction, the system is quieter than ever and easier to maintain.

• The wireless connection provides a clean cockpit, enhancing the aerodynamic effect and easy maintenance
• Wider pad clearance decreases brake noise
• Maintenance-friendly bleeding process
• Unparalleled ergonomic features, such as raised hood peaks on levers
• Brake control is optimized with light and smooth lever action
• Enhanced modulation thanks to an expanded braking control area
• Compatible with wireless or wired connection
• Includes L05A-RF pads
• Includes fork adapter for 160mm rotors
• Brake Caliper Mount: Flat Mount
• Hydraulic Hose Length: 1000
• Brake Lever Use: Right
• Hydraulic Fluid Type: Mineral Oil
• Rear Der/Shifter Compatibility: Shimano Road Di2
• Adjustable Reach: Yes
• Double or Triple: Double
• Rotor Included: No
• Color: Black
• Pad Compound: Resin
• Front Der/Shifter Compatibility: Shimano Road Di2
• Brake Lever Actuation: Hydraulic
• Drivetrain Speeds: 12
• Defined Color: Black