Shifter set Shimano DURA-ACE Di2 ST-R9150 2x11-speed

The mechanical Di2 ST-R9150 Dual Control lever set for 2-speed front and 11-speed rear derailleurs. Feature a refined hood shape with svelte shared ergonomics for more rider control in race conditions, regardless of braking choice. The ergonomically-enhanced Di2 shift levers 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. Thanks to the customizable function the levers fit any riding style and the carbon composite plastic hood material drops the weight of the whole construction. Compatible with 2x11-speed drivetrainWeight: 230 g (pair)Firmware update by E-TUBE ProjectClamp band inner diameter: 23.8-24.2 mmReach adjustSLR EV 2 E-tube portsDUAL CONTROL LEVER1 port for remote sprinter shifterRemote switchCarbon fiber reinforced plastic (CFRP) materialSLR-EV is SLR with a dual symmetric pivot brake caliper. The short-arm brake design employs two bearings and a roller to realize greater efficiency in the pivot area and deliver superior modulation and power for braking.Di2 - The advantages of Di2 (Digital Integrated Intelligence) are clear for everybody who has tested it: changing gears becomes easier, effortless and faster by simply touching the shift buttons. Control at the top of your fingers. Additional benefits include an automatic trimming front derailleur, unmatched precision plus super easy installation and adjustment. This allows automatic chain guide movement in response to the gear position of the rear derailleur. There is no more need for concentration on trimming when riding. The DURA-ACE/ULTEGRA/105 Dual Control Lever have an optimized structure with features that include the lighter weight pivot section in the near side of the shifting unit and the integral shifting cable for lighter steering. Its many component parts are made so compact and precise to achieve unprecedented high-speed performance.Important: All Shimano Di2 electronic components require the same firmware version. In order to diagnose, read or update firmware, optional device is needed. Operating components with different firmware version may cause malfunction or loss of function.