Shimano Black Shimano 105 R7170 Di2 rear hydraulic disc brake 2025

Rear hydraulic disc brake and lever. For 12 speed rear derailleur.
Lever: The new SHIMANO 105 shift/brake lever features Di2 electronic shifting for the first time, bringing precise, intuitive gear changes to even more riders. Reach adjustment and customized button functions allow you to dial in your ideal ergonomics.
Clean cockpit: Wireless connection enhances the aesthetic of your bike while keeping shifting lightning fást
Longer lasting. Uses two CR1632 batteries (battery life: 3.5 to 4 years)(Initial shifter batteries may have a shorter battery life than stated above.)
Compact, ergonomic performance cascaded from DURA-ACE
Raised hood peak improves ergonomics, while a longer hood body increases hand support
Make DURA-ACE yours with custom button function and adjustable ergonomics
Easily change button function with the E-TUBE app
Find your optimum lever position with simple reach adjust
Average weight: 423 (g/pair)

With proven hydraulic braking technology, the new SHIMANO 105 calipers feature the SHIMANO Flat Mount System and its low-profile design that is ideal for road bikes. More compact and lighter than ever, the R7170 brakes offer wide pad clearance for easy wheel removal and quiet performance as well as one-way bleeding for easy, clean maintenance.
Brake hose (kit): SM-BH90-J-SSR SM-BH90-JK-SSR
Pad: K05S-RX Resin (w/o fin), L05A-RF Resin (w/ fin), L04C-MF Metal (w/ fin)
Recommended disc brake rotor: SM-RT70, SM-RT64
Mount type: Flat mount
Piston: 2
Average weight: 123 g