Upgrade your trail bike to wireless electronic shifting with the Shimano Deore XT Di2 Drivetrain Kit. Built around the 12-speed RD-M8250-GS medium cage rear derailleur, this bundle delivers precise, cable-free shifting — and with the BT-DN320 battery, EC-DN100 charger, and SW-M8250R shift switch all included, it's everything you need to convert a mechanical drivetrain to full Deore XT Di2 performance in one purchase.

Highlights

• Wireless 12-speed Di2 shifting: no cables, no housing, no cable stretch — ever.
• Automatic Impact Recovery: the motor instantly returns the derailleur to the correct position after a trail strike.
• Shadow ES low-profile design: 23 mm of additional ground clearance compared to conventional derailleur geometry.
• Wide cassette range: medium cage suits 10–51T cassettes with a 41T total capacity.
• BT-DN320 battery included: 7.6 V / 2.32 Wh lithium-ion cell housed inside the derailleur body — protected from mud and water.
• EC-DN100 charger included: no separate purchase needed to get rolling.
• Three-button SW-M8250-R shift switch: tactile click prevents mis-shifts; third button is fully programmable via E-TUBE Project.
• Multiple shift modes: hold-down multi-shift and 2-step multi-shift for versatile riding styles.
• Covered pulley teeth and wide-link skid plate: shields internals from debris and resists direct impact damage.
• E-TUBE Project compatible: customise shift modes, assign button functions, and update firmware via the smartphone app.

RD-M8250-GS Rear Derailleur

The medium cage RD-M8250-GS is engineered for 10–51T cassettes with a 41T total capacity, covering the full range of Shimano 12-speed MTB gearing. Shimano Shadow ES keeps the profile low to the ground, adding 23 mm of clearance compared to conventional designs. The Automatic Impact Recovery motor instantly resets the derailleur if it deflects from a rock or root strike, while covered pulley teeth and a wide-link skid-plate structure resist debris ingestion and direct impacts. Shadow RD+ clutch stabilisation reduces chain slap and prevents derailments on rough terrain — adjustable on/off for road transfers or trail riding.

BT-DN320 Battery & EC-DN100 Charger

The BT-DN320 lithium-ion battery (7.6 V, 2.32 Wh, 305 mAh) sits securely inside the derailleur body, keeping it protected from water and trail debris while remaining fully removable for charging. Charge status is visible via the Shimano E-TUBE Project app. The included EC-DN100 charger means you can top up the system without any additional accessories — just clip on and charge.

SW-M8250-R Shift Switch

The right-hand wireless shift switch uses a short-stroke paddle design with a tactile click to prevent mis-shifts. Multi-axis adjustability suits a wide range of hand positions and bar diameters. The programmable third button can be assigned custom functions — such as remote suspension lockout control — through the Shimano E-TUBE Project app. Communicates wirelessly with the derailleur via Bluetooth Low Energy and ANT+ private channel. Clamp band mount fits standard 22.2 mm MTB handlebars.

Compatibility & Fit

Compatible with all Shimano 12-speed MTB cassettes, chainrings, and chains including XTR M9100/M9200, Deore XT M8100, SLX M7100, and Deore M6100 groupsets. The RD-M8250-GS medium cage suits 10–51T cassettes (41T total capacity); for 10–51T with a longer wrap use the SGS long-cage variant. Requires a Micro Spline freehub body for 12-speed cassette compatibility. Direct mount and standard hanger compatible. Shift switch clamp band diameter: 22.2 mm. 1x drivetrain specific (0T front difference).