The system's SC-M9050 Display Unit
The XTR FD-M9050 front derailleur
The XTR RD-M9050 rear derailleur
The XTR Di2 Firebolt shifter
The SM-BTC1, which serves as a battery mount and a wiring junction
In 2009 Shimano brought electronic gear-shifting to road bikes, in the form of its Dura-Ace Di2 group. The slightly-less-pricey Ultegra Di2 system followed, although it was still aimed at roadies. Today, however, the company announced the upcoming release of XTR M9050 Di2, which will allow mountain bikers to swap their derailleur cables for electrical wiring.
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