Shimano 105 Di2 ST-R7170 12 Speed Shifters + Flat Mount Caliper Size:Rear Brake - Left Hand Formerly known simply as “Pro

Formerly known simply as “Pro Shift

The 2-Way Fit profile allows you to mount either a clincher tyre or a tubular tyre

Built to last and easy to use

Speed (CS): 12s

Shimano 105 Di2 ST-R7170 12 Speed Shifters + Flat Mount Caliper Size:Rear Brake - Left Hand Formerly known simply as “ProWorry 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. Features Clean cockpit: Wireless connection enhances the aesthetic of your bike while keeping shifting lightning fast Longer lasting. Uses two CR1632 batteries