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ST-R9170 hydraulic disc, Di2 E-tube STI


In Stock


  • Top of the range, high-performance Dura-Ace hydraulic disc brake Di2 STI's give you control, modulation, and power with minimal effort in all riding conditions
  • With Di2 technology shifting is easy and precise - just a light touch, as soft as a mouse click, is sufficient for the front or rear derailleur to instantaneously select the correct gear
  • The removal of traditional mechanical cables in favour of electrical wires eliminates poor shifting caused by contaminates, corrosion and stretching, and also provides effortless gear shifts
  • Simply pressing tactile buttons allows effortless and comfortable shifting even when your hands are cold