The Shimano XTR RD-M9250-GS is the pinnacle of wireless mountain bike shifting — a fully wireless Di2 12-speed rear derailleur designed for riders who demand instant, precise gear changes on the most demanding terrain. The medium cage (GS) suits cassettes up to 45T, offering exceptional gearing range while the wedge-profile body delivers a full 23 mm of additional ground clearance compared to previous XTR designs. Purpose-built for both weight-conscious XC racers and technical trail riders, it combines electronic precision with class-leading impact protection.

Highlights

• Fully wireless Di2: Cable-free electronic shifting with Bluetooth LE and ANT+ connectivity for fast, reliable actuation with no external wiring.
• HYPERGLIDE+: Cassette and chainring geometry engineered to deliver smooth, rapid shifts even under heavy pedalling load.
• Automatic Impact Recovery: The derailleur pivots away from trail obstacles on impact, then immediately returns to position — protecting the hanger, body, and drivetrain.
• Shadow ES clutch system: Reduces chain slap and drop on rough terrain, keeping the drivetrain quiet and efficient.
• 23 mm extra ground clearance: The low-profile wedge shape deflects rock strikes and dramatically reduces snag risk in technical terrain.
• Integrated rechargeable battery: Sealed BT-DN320 battery housed inside the derailleur body — protected from trail debris and moisture.
• Dual-spring chain tensioner: Maintains positive chain wrap and reduces the risk of chain skip under load.
• Wide link structure and skid-plate design: Carbon-reinforced cage and solid pulley wheels resist abrasion and impact in harsh conditions.

Wireless Di2 and HYPERGLIDE+

The RD-M9250-GS runs on Shimano's latest wireless Di2 platform, eliminating external cabling without compromising the precise electronic indexing Di2 is renowned for. HYPERGLIDE+ combines chainring and cassette geometry with the electronic actuator to enable confident shifts mid-climb and through technical corners — exactly when reliable gearing matters most. System status is indicated via integrated LED, and full configuration is handled via the Shimano E-TUBE PROJECT app over Bluetooth LE or ANT+.

Impact Survivability and Trail Protection

XTR's Automatic Impact Recovery function detects when the derailleur contacts a trail obstacle, allowing the motor to pivot the body clear and return to position immediately once past the obstruction. This actively protects the derailleur hanger, the body, and the drivetrain from damage rather than relying solely on passive protection. The low-profile wedge shape deflects debris and rock strikes, the carbon-reinforced cage resists abrasion, and solid pulley wheels stand up to the grit and mud of extended trail use.

Compatibility and Fit

Compatible with Shimano XTR M9200 and M9250 12-speed Di2 drivetrains. Suits cassettes with a minimum sprocket of 9T and a maximum sprocket of 45T; total chain wrap capacity is 36T. Requires a Shimano BT-DN320 battery (sold separately). Designed for use with Shimano HG+ 12-speed chain. Mounts to a standard rear derailleur hanger. Configure and update firmware via the Shimano E-TUBE PROJECT app.