Hydro Disc Set by Shimano features a wireless STI lever and hydraulic disc brake caliper and hose

Shimano 105 R7170 Di2 components balance wireless performance with durable value focused materials. The levers feature unparalleled ergonomics refined with pro feedback.

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. Finely tuneable reach adjusters for the levers enable custom fitment for all hands. Hydraulic reservoir tank provides pad to rotor clearance auto-adjust maintaining braking performance during pad wear.

Levers use CR1632 batteries which last for approximately 1.5-2 years