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Ultegra ST-R8170 Shifter

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Why We Like The Ultegra ST-R8170 Shifter

Built to mate to our Shimano 12-speed Di2 systems the Shimano Ultegra ST-R8170 Shifter brings wireless tech to the Di2 lineup. These shifters are aerodynamically shaped to cut through the wind while offering 1-2 years of battery life.


  • Ultegra level Di2 shifters for 12-speed Shimano drivetrains
  • Ergonomically shaped lever hoods for comfortable miles
  • Wireless shifting cuts down on shifter bulk
  • Hydraulic braking brings us to a stop with ease
  • Item #SHIU1FB
Crankset Compatibility
2x12 speed
Compatible Components
Shimano Di2 12-speed drivetrains
Claimed Weight
[pair] 391g
Manufacturer Warranty
2 years