Shimano 105 ST-R7170 12sp Di2 Hydraulic Shifter + BR-R7170 Caliper

The Shimano 105 ST-R7170 is a 12-speed Di2 hydraulic shifter that pairs wireless electronic shifting with hydraulic braking in one lever. Coin-cell batteries power the shifter’s wireless connection to the rest of the groupset, bringing Di2-level performance to a more affordable tier.

The included BR-R7170 caliper offers wider pad clearance than its predecessor, reducing rotor rub and improving consistency in wet or muddy conditions. Reach is adjustable and shift buttons are customizable through the E-Tube app, and the kit ships with a brake hose and resin pads ready to install.

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