Bring your trail bike into the future with the Shimano Deore XT Di2 M8250 Complete Upgrade Kit. This all-in-one bundle delivers ultra-fast wireless shifting, trail-proven durability, and Shimano’s latest drivetrain tech for serious riders who demand peak performance. At the heart is the M8250 Di2 rear derailleur—lighter, stronger, and smarter, engineered with 23mm of extra ground clearance and automatic impact recovery to keep your ride smooth and snag-free. Paired with the RAPID ES shifter, this setup offers intuitive control with customizable button functions and precise shift actuation. Power comes from the integrated BT-DN320 battery, which tucks safely inside the derailleur and charges easily with the compact EC-EN100 charger. The kit is rounded out with the wide-range CS-M8200 cassette and smooth-shifting CN-M8100 chain, delivering a full 12-speed wireless drivetrain built for real-world trails. What's Included: RD-M8250 Di2 Rear Derailleur Rugged, mid or long cage derailleur with wireless shifting, impact recovery, and up to 510% gear range. SW-M8250-R/IR Di2 Shifter Customizable wireless shifter with ergonomic paddles and programmable multi-shift modes. CS-M8200 Cassette Wide-range 12-speed cassette with Hyperglide+ for smooth, fast shifting under load. CN-M8100 12-Speed Chain Durable SIL-TEC chain with enhanced retention and quick-link installation. BT-DN320 Di2 Battery Compact, removable battery powers your Di2 drivetrain for up to 340 km per charge. EC-EN100 Di2 Charger Slim, easy-to-use charger designed specifically for the Di2 battery. Includes two quick links. Why Choose the XT Di2 M8250 Complete Upgrade Kit? This complete wireless drivetrain upgrade brings cutting-edge shifting technology and race-ready efficiency to the trail. With seamless customization via Shimano’s E-Tube app, precise shift mapping, and rugged component construction, the XT M8200 kit is built to go faster, shift smarter, and ride harder. Derailleur Cassette Shifter Chain Works With Derailleur Model: XT M8250 Model ID: RD-M8250-GS (Mid Cage) RD-M8250-SGS (Long Cage) Shift Technology: Wireless Communication Protocol: Di2 Max Tooth: 38t Drive Config: 1x Weight: GS - 444 g | SGS - 446 g Cassette Model: XT M8200 Model ID: CS-M8200-12 Gearing: 9-45t (500% Range), 10-51t (510% Range) Technology: HYPERGLIDE+ Cog Sizes: 9-45t: 9-11-13-15-17-19-21-24-28-33-39-45t 10-51t: 10-12-14-16-18-21-24-28-33-39-45-51t Weight: 9-45t - 422 g | 10-51t - 458 g Installation Note: 45t Requires the Shimano TL-LR21 Cassette Tool for installation. Shifter Model: XT M8250 Model ID: SW-M8250-R/IR Shifter Type: Wireless Orientation: Right Clamp: 22.2mm Band Clamp Chain Model: XT M8100 Model ID: CN-M8100 Type: HG Rear Speeds: 12 Roller Link Plate: Chromizing Pins: Hollow # of links: 126 Weight: 242g Works With The Shimano XT Di2 M8250 Complete Upgrade Kit is 100% backwards compatible with your current Shimano 12-Speed cassette, crankset/chainring, and chain. Compatible models include: XTR M9100 and M9200, Deore XT M8100 and M8200, SLX M7100, and Deore M6100. Medium cage derailleurs are compatible with 45t cassettes. and long cage derailleurs are compatible with 51t cassettes.