Fresh cables and housing feel great, don't they? Like your drivetrain is brand new. As sure as the fizz follows the plop, however, those housings get contaminated and make your drivetrain feel old and worn out a few weeks later. Sealed cables and rubber ferrules are not the solution, electronic shifting is.
For those of us who can't bear the thought—or whose terrain won't let them—give up the gearing range of a multi-chainring set-up, the Shimano Di2 9070 2x11 Front Derailleur takes away all of the hassle.
XTR Di2's most impressive offering is Synchronized Shifting, which takes the burden of front derailleur management out of your hands without losing the range advantages of a full drivetrain. Syncro Shift is an optional feature which is turned on or off at the 9050 Digital Display Unit, and allows the front derailleur to be controlled by the Di2 system. When shifting with the right-hand (rear) shifter, the rear derailleur decides what the most efficient gear combination would be based on chainline and your preselected power output profile. Then, if needed, the front and rear derailleurs shift into the optimum gear combination automatically. Syncro Shift can be turned off for manual control of both ends of your drivetrain, but why would you do that? Your unused front Di2 shifter is easily repurposed into a control for Fox iCD-equipped suspension.
Shimano's 9070 front derailleur must be mated to an adapter compatible with your frame, so be sure to order the correct mount; high band clamp, low band clamp, or direct mount versions.
Eliminate the vagaries of cable-actuated shifting from your rides, and step up to a Di2 system drivetrain for flawless drivetrain performance. Di2 delivers hassle-free, maintenance-free operation that's more powerful and accurate than anything possible from traditional systems.