Shimano 105 Di2 ST-R7170/BR-R7170 Flat Mount Hydraulic Disc Brake Caliper and Lever

Worry-free Di2 shifting in a compact shifter size

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.

Disc brakes optimized for road riding

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.