Shimano Dura Ace Di2 ST-R9170 Lever & BR-R9170 Brake Set

Shimano Dura-Ace ST-R9170 & Caliper

Includes:

1x ST-R9170-L & 1x BR-R9170F

1x ST-R9170-R & 1x BR-9170R

Shimano's Di2 drivetrain continues its evolution and with the release of the Dura-Ace ST-R9170 Di2 Hydraulic STI Lever & Disc Brake Caliper, an entirely new hydraulic disc brake system comprising STI shift/brake levers and new flat-mount calipers. Previous versions of the top-tier Di2/Hydro levers and calipers were handled by the ST-R785 set, a model that wasn't confined to a group and most likely a place holder until the UCI decided its stance on road bike disc brake use in competition. This marks the first time we see hydraulic disc brakes under the Dura-Ace moniker and we couldn't be happier. Shimano's excellent E-Tube project offers customizable shifting set-up so no matter your cycling discipline, you are fully in control in how you program your shifting. Sold as individual right and left levers, the levers include specific BR-R9170 flat mount brake calipers and hydraulic hose kits.

Technical specifications: 

Material lever: Aluminum, Carbon Composite 
Material caliper: Aluminium 
Material brake pistons: Ceramic 
Technology: Synchronized shifting, Auto-Trim, E-Tube, SLR Evo Technology 
Gears: 2x11-speed, freely programmable 
Reach adjustment: integrated (with tools) 
Compatibility caliper: Shimano BR-R9170 Flat Mount (Road, incl.) 
Brake pads: L02A Resin with cooling fins (Ice Tech, incl.) 
Brake line: Shimano SM-BH90-JK-SS (incl.) 
Brake Oil: Shimano Mineral Oil for disc brakes 
Color: Black 

Weight: 876g (. Shift / Brake lever left and right including calipers and lead - filled) 

IR9170DLF4SA10A UPC: 689228892057

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IR9170DRRDSA17A UPC: 689228892095