All it takes is the quick push of a button to tell the highly precise and speedy servo actuator to change gears for you. Race-proven, the Shimano Dura Ace Di2 rear derailleur will shave precious seconds off your time to give you more than just a technological advantage.
Adaptable X12 Hanger
We optimized our new dropout design based on the Syntace X12 through-axle system, enlarging the area of the frame where the hanger is mounted. We can now fit the longer Direct Mount hangers. Shifting precision and stiffness is therefore improved. With the new design it's also possible to swap the whole contact area of the axle with the hanger should the system be worn out.