A true shifting and disc brake system for the next generation race bike, the Shimano Dura-Ace ST-R9170 Di2 Hydraulic Lever will propel you to the next level. The Di2 Dual Control Lever features a refined hood shape with svelte shared ergonomics for more rider control in race conditions. The ergonomically-enhanced Di2 shift levers now produce a more defined shift click for a more intuitive feel and quicker shifting operation and expanded E-Tube customization allows every switch the option to independently turn on or off multi-shift.