The Shimano Dura-Ace Di2 9180 Brake/Shift Lever is a specialized component for your triathlon or time trial bike. A left lever gives you the option for a 2x setup while the right lever option is needed for any 11-speed setup. With this lever, you can confidently progress through your gearing and brake with confidence while remaining in your most aero position. Intuitive shifting control with a button on each side of the lever allows you to keep a firm grip while you shift so you can keep putting in optimal power transfer. This gives you the best control at the highest speeds. The multi shift function can be turned on or off to fit you specific riding style. An integrated E-Tube cable and internal cable routing allow you to keep a clean cockpit. The Shimano Dura-Ace Di2 9180 Brake/Shift Lever is a key component to triathlon and time trial efficiency.