Include SM-FD905-L: 31.8/34.9mm Low Clamp Di2 Only Reliable gear changes under load Computer controlled auto trim Shimano Synchronized Shift compatible Powerful, Di2-Optimized Front Shifting With XTR M9050 Di2, front shifts require very little effort, with the swift tap of a button already at your fingertip. The digital control of Shimano's front derailleur means that the exact same input is used for each and every shift, the definition of reliability. Computer controlled auto trim means that you can remain focused on the trail ahead. The FD-M9050 is also Shimano Synchronized Shift compatible, so if you choose, a single shifter can control both front and rear shifting, custom tuned to your preferences. Note: In order to ensure proper functioning of the electronic Di2 drive system, all components require the same firmware version. The optional diagnostic device allows for reading out or updating the firmware version. An operation of components with different firmware versions may cause a malfunction or loss of function.
