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Old 07-14-15, 08:34 AM
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wgscott
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Sorry for the necro-post, but this might be possible now.

Unless I am reading this wrong, it looks like Lennard Zinn says that if you purchase XTR (mountain bike) front and rear derailleurs, you can use these with Di2 road shifters.


You can run a full XTR Di2 drivetrain with your Di2 road levers (you could use any Di2 ST or SW Di2 switch, like climbing, sprint, or TT switches with it). That would be analogous to mixing 10-speed ST-6770 (Ultegra Di2 shifters) with 11-speed RD/FD, or 11-speed ST-6870 (Ultegra Di2) or ST-9070 (Dura-Ace Di2) with 10-speed FD/RD-6770 (original Ultegra Di2). Both of these road combinations do work.

Tech FAQ: Mixing Shimano road, MTB Di2 derailleurs - VeloNews.com
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