105 Di2 ST-R7170+BR-R7170 12-speed Disc Brake rear

The Shimano 105 Di2 groupset takes the best from the high end Dura Ace Di2 and Ultegra Di2, in a more cost-efficient package, for precise, fast and reliable electronic shifting at an affordable price point. The ST-R7170 shifters are powered by 2xCR1632 batteries and wirelessly control the rest of the groupset. They also feature wireless customisation via the E-Tube app and operate the powerful BR-R7170 brake caliper, now with 10% wider pad clearance.

• Adjustable reach and customizable buttons
• Powered by 2x CR1632 batteries
• Includes 1700mm brake hose
• L03A Resin brake pads included

Specifications