Precision-engineered high performance Dura-Ace hydraulic disc brake STI's give you control, modulation and power with minimal effort in all riding conditionsDura-Ace R9100 STI are lightweight thanks to carbon fibre lever blades, carbon composite bracket body, and a titanium clamp band / fixing boltHydraulic brake lever provides excellent stopping power with less effort especially from the hood positionHydraulic reservoir tank provides pad to rotor clearance auto-adjust maintaining braking performance during pad wearShift cables routed under the bar tape using Polymer coated inner wires make for a smooth shift action, providing faster, lighter shiftingVivid Index shifting with short stroke to the release levers gives a quick and accurate shiftGear shift cables can either be routed round the front or rear of the handlebar to suit all rider preferencesErgonomic shift arc follows natural hand movement with inward shift stroke distance reduced for rapid and precise gear changesSmall volume ergonomically designed smooth lever hoods for added comfortFinely tuneable reach adjusters for the levers enable custom fitment for all handsFree stroke adjustment for pad to rotor contact settingKit contains left hand bled ST-R9120 STI, BR-R9170 flat mount brake calliper with pads, hoses and mineral oil (without rotors or adapters)Weight: 505 grams per set