Engineered for XC racers and performance-driven trail riders, the Shimano XTR Di2 M9200 XC 12-speed Drivetrain delivers intelligent wireless shifting, race-tuned efficiency, and lightweight durability for the most demanding conditions. Anchored by the featherweight M9250 Di2 rear derailleur and the compact, high-performance M9200 XC crankset with a 168mm Q-Factor, this drivetrain is built for speed, precision, and podium-level 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 Designed for elite XC performance, this HOLLOWTECH II crankset combines maximum stiffness with minimal weight. The narrower 168mm Q-Factor provides a more efficient, race-optimized pedaling stance. M9250 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 M9200? This wireless, race-focused drivetrain brings Shimano’s most refined electronic shifting to the XC circuit. With intuitive control, a narrower Q-Factor for peak pedaling efficiency, and ultra-reliable wireless performance, the XTR Di2 M9200 is the go-to drivetrain for serious racers and riders who demand the best. XTR DI2 M9220 XC Drivetrain 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 M9200 Crank Arm Model ID: FC-M9200 Chainring Model ID: SM-CRM96 Material: Aluminum P.C.D: Direct Chainline: 55mm Q-Factor: 168mm 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 M9200 XC 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.