Built for the demands of modern trail and enduro riding, the Shimano XTR Di2 M9220 Enduro 12-speed drivetrain delivers next-level precision, power, and reliability with every shift. Centered around the ultra-durable, wireless M9250 Di2 rear derailleur, this kit combines intelligent shifting, rugged component design, and a compact, race-ready gear range optimized for aggressive trail performance. 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. XTR M9200 Crankset Engineered for elite cross-country performance, the M9220 (Enduro) crankset embodies Shimano’s HOLLOWTECH II forged construction, balancing lightweight efficiency with uncompromising stiffness. SW-M9250-R/IR Di2 Shifter Shimano’s most ergonomic, adjustable shifter yet. Features customizable multi-shift modes, a programmable third button, and satisfyingly fast, tactile actuation. 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. 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. Why XTR Di2 M9220? This trail-focused Di2 drivetrain system brings wireless precision, intelligent gear selection, and rock-solid reliability to every ride. With a wide gear range, rugged construction, and Shimano’s smartest shifting to date, it’s built to meet the demands of modern mountain biking. Specs: Derailleur Cassette Crankset 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, 10-51t 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. Crankset Model: XTR M9220 Crank Arm Model ID: FC-M9220 Chainring Model ID: SM-CRM96 Material: Aluminum P.C.D: Direct Chainline: 55mm Q-Factor: 176mm Chainring Teeth: 28t, 30t, 32t, 34t, 36t, or 38t Shifter Model: XTR M9250 Model ID: SW-M9250-R/IR Shifter Type: Wireless Orientation: Right Clamp: 22.2mm Band Clamp, I-Spec EV 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 M9220 Enduro Drivetrain is 100% backwards compatible with your current Shimano 12-Speed cassette, crankset/chainring, and chain. Compatible models include: XTR M9100, Deore XT M8100, SLX M7100, and Deore M6100. Medium cage (GS) derailleurs are compatible with 45t cassettes, and long cage (SGS) derailleurs are compatible with 51t cassettes.