Designed for aggressive trail and enduro riding, the Shimano XTR Di2 M9200 Complete Upgrade Kit delivers lightning-fast wireless shifting, intuitive customization, and rock-solid durability. At the core is the all-new M9250 Di2 rear derailleur. This 12-speed kit is rugged, lightweight, and seamlessly integrated with the rest of the system for a smarter, faster ride experience. Whether you're hammering through technical terrain or sprinting to the finish, this complete drivetrain kit provides the precision and performance elite riders rely on. What's Included: M9250 Di2 Rear Derailleur Built to thrive in the toughest conditions, the Shimano XTR M9250 Di2 Rear Derailleur is the go-to choice for elite enduro racers and XC riders who demand reliability and low weight. CS-M9200 Cassette Engineered for elite-level performance, the XTR CS-M9200 cassette represents the latest evolution of Shimano’s HYPERGLIDE+ technology. Redesigned tooth profiles deliver smoother, faster, and more precise shifting under load, making it ideal for racing and aggressive trail riding. M9250 Di2 Shifter Shimano’s most ergonomic, adjustable shifter yet. Features customizable multi-shift modes, a programmable third button, and satisfyingly fast, tactile actuation. CN-M9100 12-Speed Chain Engineered for HYPERGLIDE+ drivetrains, this chain delivers fast, shockless shifting with unmatched chain retention and drivetrain efficiency. Includes two quick links. BT-DN320 Di2 Battery Seamlessly integrated into the rear derailleur for protection, this 310mAh battery powers fast, consistent shifting in all trail conditions and is fully removable for charging. EC-DN100 Battery Charger Compact and user-friendly, the EC-DN100 makes recharging quick and easy, ensuring your drivetrain stays ready for long days on the trail. Why Choose the XTR Di2 M9200 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 XTR M9200 kit is built to go faster, shift smarter, and ride harder. XTR Di2 M9200 Complete Upgrade Kit Specs: Derailleur Cassette Shifter Chain Works With Derailleur Model: XTR M9250 Model ID: RD-M9250-GS (Mid Cage) RD-M9250-SGS (Long Cage) Shift Technology: Wireless Communication Protocol: Di2 Max Tooth: 38t Drive Config: 1x Weight: TBD Cassette Model: XTR M9200 Model ID: CS-M9200-12 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 Installation Note: 45t Requires the Shimano TL-LR21 Cassette Tool for installation. Shifter Model: XTR M9250 Model ID: SW-M9250-R/IR Shifter Type: Wireless Orientation: Right Clamp: 22.2mm Band Clamp Chain Model: XTR M9100 Model ID: CN-M9100 Type: HG Rear Speeds: 12 Roller Link Plate: Chromizing Pins: Hollow # of links: 126 Weight: 242g Works With The Shimano XTR Di2 M9200 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.