Kit includes one each of the following:

• RD-M8250-SGS Long Cage Derailleur (Max 51T)
• SW-M8250 Shift Switch
• BT-DN320 Di2 Battery
• EC-DN100 Di2 Battery Charger
• SM-CN910-12 Quick Chain Link (Pair)

The all-new DEORE XT M8250 long-cage derailleur paired with a standard 10-51T M8200 cassette (sold separately) gives all types of riders the range and robustness to tackle every trail on the mountain. With built-in Automatic Impact Recovery, a new, impact-deflecting wedge shape, and simple covered-pulley solutions, this derailleur stands up to harsh trail impacts and still retains its lightning-quick shifting speed and high level of performance.