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Shimano Ultegra Di2 12-Speed Hydraulic Disc Brakeset #ST-R8170+BR-R8170

Shimano Ultegra Di2 12-Speed Hydraulic Disc Brakeset #ST-R8170+BR-R8170

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When developing the Ultegra R8100 series,Shimano took a holistic and 100 % performance-oriented approach, because greatspeed means great responsibility. Faster than ever before, the 12-speed roadgroupset scores with unparalleled control and comfort anytime and anywhere –whether in an everyman race, on the hunt for a personal best time or on acompanionable ride.


As with the Dura Ace R9200, not only doesHyperglide+ make its way into the Ultegra's components, also its Di2 parts relyon Wireless technology to simplify operation and ensure smooth shifting.


Shimano Ultegra shift/brake set consistingof the electronic ST-R8170 STI lever for lightning-fast shifting and thehydraulic BR-R8170 disc brake caliper for superbly controllable and quietbraking. Trouble-free maintenance is provided by the proven One Way Bleedingconcept and the Easy Hose Joint System which simplifies brake hose exchanges.


J-Kit (Easy Hose Joint System)

At brake systems with J-Kit hose joint thebrake lever features an integrated olive what makes an easy brake hoseinstallation and removal possible.



Shimano Ultegra Di2 ST-R8170 STIbrake/shift lever

The ST-R8170 STI levers are not onlycharacterised by their optimised ergonomics and even more precise dosing of thehydraulic disc brakes, but also impress above all with lightning-fast shiftingprocesses, which are achieved not least through the Wireless functionality.

The wireless connection also offers anotheradvantage: without electric cables, installation is easier and the cockpitappears tidier. Nevertheless, the shift/brake levers still offer a cableconnection (EW-SD300) for the use of additional shifters in the drops or thetop of the handlebar. For numerous customisation and configuration options,compatibility with the improved E-Tube Project app, which, like previousversions, allows you to adjust shift modes (Synchro-/Semi-Synchro-Shift,Multi-Shift), shift speed and button assignment on the fly.

To ensure that the braking performance isin no way inferior to the shifting functionality, the Ultegra Dual Controllevers feature Servowave technology. With the help of an extended brake controlrange, this ensures excellent dosing that offers optimum comfort and controleven in challenging conditions. Of course, for individual adjustment, thelevers feature the option of reach and free stroke adjustment.


Shimano Ultegra BR-R8170 disc brakecaliper

All around improved, the Shimano UltegraBR-R8170 caliper offers optimised dosing, quieter braking performance andextremely simplified maintenance.

While a faster-gripping initial brakingforce always gives the feeling of full control, the 10 % increase in brake padspacing allows for a significant reduction in noise during braking, despite aflatter overall construction. In addition, when the RT-MT900 brake disc rotor(sold separately) is used, its deformation-resistant design, even withincreasing heat, helps to create an extremely quiet and smooth braking system.

To simplify maintenance, the hydraulic2-piston brake caliper not only features the proven One-Way-Bleeding system,but also a separate arrangement of bleed nipple and opening screw. On the onehand, this minimises the risk of the bleed kit hose slipping off when openingor closing the system and, on the other hand, makes it unnecessary to dismantlethe caliper from the frame for bleeding process.




STI housing: carbon fiber reinforcedpolymer (CFRP, painted)

brake lever, brake caliper: aluminium (painted)

pistons: resin

usage bikesport: Road Bike

shifting system: 12-speed

shifting actuation: Electronic

brake actuation: hydraulic

brake lever version: Drop Bar

brake fluid: Mineral Oil

Disc brake - version: Front Wheel, Brake& lever set

brake caliper: Flatmount

chainrings: 2

Color: Black

shift lever type: STI/Ergopower/DoubleTap

Weight (manufacturer's specs):

approx. 391 g (STI lever, pair)

approx. 146 g (front caliper)

approx. 136 g (rear caliper)

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Delivery Options

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