Shimano Ultegra Di2 R8170 Hydraulic Disc Brake/Shift Lever Kit (Black) (Left) (2x) (Flat Mount) (Caliper Included) (Electronic) (Wireless)

Shimano Ultegra Di2 R8170 Hydraulic Disc Brake/Shift Lever Kit (Black) (Left) (2x)
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The control center for Shimano's 12-speed road shifting system, the Shimano Ultegra Di2 R8170 Hydraulic Disc Brake/Shift Lever Kit brings new shifter ergonomics to Di2 along with wireless electronic shifting. Coupled with Servo-Wave brake lever action and Shimano's simple bleeding process – you get excellent braking performance along with the latest in shifting technology. 

Note: This product is a shifter and brake caliper only (sold per side). Complete bicycle pictures are included for illustrative purposes only.


  • 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 and enhanced modulation thanks to an expanded braking control area
  • Compatible with wireless or wired connection
  • Works with add-on satellite shifters
  • High electronic energy efficiency: 1.5 to 2 years of battery life with easy-to-change CR1632 shifter batteries
  • Maintenance-friendly bleeding process
  • Front caliper is compatible with 160mm rotors

Shifter Style: Lever (Road)
Speed: 2 x 12 Speed
Derailleur Compatibility: Shimano Di2
Shift Mechanism: Electronic (Semi-Wireless)
Adjustable Reach: Yes
Brake Type: Hydraulic
Brake Fluid: Mineral Oil
Brake Mount: Flat Mount
Brake Pads: Organic/Resin
Hose Length: 1000mm (Front), 1700mm (Rear)
Color: Black
Weight: 391g (Shifter Pair), 146g (Front Brake Caliper), 136g (Rear Brake Caliper)


  • R8170 Shift/Brake Lever
  • Disc Brake Caliper
  • Pre-bled housing

Check out our full selection of Shimano Ultegra 12 Speed Di2 Parts.

This product was added to our catalog on June 28, 2022