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
Shifters are lightweight thanks to carbon fibre lever blades, carbon composite bracket body, and a titanium clamp band / fixing bolt
Drop bar STI with shift buttons located in a near identical place to the positions you’d assume shifting using a mechanical Shimano STI
Hydraulic brake lever provides excellent stopping power with less effort especially from the hood position
Hydraulic reservoir tank provides pad to rotor clearance auto-adjust maintaining braking performance during pad wear
Finely tuneable reach adjusters for the levers enable custom fitment for all hands
Free stroke adjustment for pad to rotor contact setting
Levers are supplied without electrical cables, as these need to be ordered separately to suit
Two ports for use with E-tube electric cables
Kit contains left hand bled ST-R9170 STI, BR-R9170 flat mount brake calliper with pads, hoses and mineral oil (without rotors or adapters)