Shimano 105 Di2 ST-R7170 DB

The Shimano 105 ST-R7170 Disc Brake disc brakes are powerful and even more controllable than previous generation 105 brakes. The first-generation Shimano 105 Di2 uses the same technology as the Ultegra and Dura-Ace shifters.

The brake lever is adjustable in reach with a socket on the inside. Nice compact design that fits comfortably in the hand. Equipped with 2x CR1632 batteries (battery life: 3.5 to 4 years).