Shimano Dura Ace Di2 20 Disc lever RIGHT, ST-R9170R 11-speed

Synchronized Shift enables more efficient gear changes while driving. The function offers numerous advantages such as faster, more precise shifting under all riding conditions and minimizes the load on the drivetrain.

When Synchronized Shift is activated, the rear derailleur and front derailleur can be controlled with just one switch. With the Synchronized Shift function fully activated, the front derailleur detects the position of the rear derailleur and automatically shifts to the most efficient gear with the best chainline, so you never have to worry about front shifting or compensation shifting again.

With the Semi-Synchronized Shift function activated, you can shift the derailleur manually, giving you optimum control when selecting the best gear combination for your riding style. The system automatically makes the necessary correction by automatically shifting to the correct rear gear with the best chainline.


Hydraulic braking system optimally tuned for racing
Multi-Shift can be selected separately for each shifter
Clearer click feel and ergonomic shift lever position
Ideal ergonomic and softer grip rubber shape with improved thickness
Supplied without bleed adapter (this is required for bleeding)