Double Commands Shimano Dura-Ace ST-R9150 Di2 11v

Pair of specific gearbox controls for Dura-Ace R9150 Di2 electronic transmission. The Dura-Ace ST-R9150 controls have been slightly revised in the design of the buttons and in the curvature of the lever for greater control and safety, in particular they are better accessible also with winter gloves. Thanks to the system Shimano Synchronized Shifting the R9150 gearbox and the derailleur can be operated simultaneously and synchronized by acting on a single command. The Syncro-Shift system allows the control unit to offer 3 operating modes: Full-Synchro, Semi-Synchro and manual. Synchronized Shift system can be programmed and customized thanks to software Shimano E-Tube.