Shimano XT M8520 Di2 Upgrade Kit

Fully Wireless Di2 Platform: Experience Shimano’s fastest, most accurate wireless MTB shifting system, designed for peak performance and absolute reliability.
Ultra-Robust Drivetrain Construction: Engineered to handle high-impact trails, offering total rider confidence on every ride.
Refined, Intuitive Ergonomics: Customisable controls designed for a natural fit and feel, letting you fine-tune your setup for optimal comfort and control.
Trail-Ready Flexibility: Choose from multiple Di2 component configurations to suit your terrain, riding style, and performance goals.

Shimano continues to redefine the limits of mountain bike performance with the XT M8520 Di2 Upgrade Kit — the next evolution in wireless MTB shifting technology. Building on a legacy of precision engineering and race-proven innovation, this fully wireless Shimano Di2 XT 12-speed drivetrain delivers lightning-fast shifting, uncompromising reliability, and the rugged durability demanded by today’s most aggressive XC and enduro riders.

Engineered for Real-World Performance
From intense climbs to technical descents, the XT Di2 M8520 system is built to withstand the toughest trail conditions. Featuring Shimano’s most advanced drivetrain construction to date, the M8520 offers enhanced ergonomics, smarter connectivity, and an intuitive setup that keeps you focused on the ride—not your components.

Upgrade Kit Includes:
XT M8250 Di2 12-Speed Rear Derailleur (SGS or GS options)
XT Di2 SW-M8250-R Wireless Shifter Switch (I-Spec EV or Band-On)
BT-DN320 Di2 Rear Derailleur Battery
EC-EN100 Di2 Battery Charger

Di2 Rear Derailleur – Smarter. Stronger. Sleeker.
The legendary Shimano Shadow RD+ design evolves once again. The XT M8520 Di2 Rear Derailleur features a reinforced stabiliser unit that automatically repositions after impact, minimising trail damage. Its low-profile form and dual-spring chain tensioner reduce strike potential, while a streamlined wedge design glides past rocks and roots with ease.

Choose from:

GS (Medium Cage) – Optimised for the CS-M8200 9–45T cassette

SGS (Long Cage) – Compatible with wide-range 10–51T cassettes

Di2 Wireless Shifter – Effortless Control
The SHIMANO RAPID ES Di2 Shifter Switch redefines bar ergonomics with fully customisable button functions and adjustable placement. Whether you prefer I-SPEC EV mounting (direct to compatible Shimano brake levers) or the Band-On option for independent handlebar setup, every shift is precise, effortless, and lightning-fast. Designed for full control and minimal distraction—so you can stay laser-focused on the trail.

Di2 Rear Derailleur Battery – Compact Power for Endless Rides
Compact yet powerful, the BT-DN320 Di2 Battery integrates seamlessly into the XT Rear Derailleur, delivering consistent wireless performance. Protected within a sealed compartment, it remains stable even over rough terrain and is fully removable for convenient charging. One charge powers up to 340 km of uninterrupted electronic shifting.

Di2 Charger – Simple, Smart, and Efficient
Keep your system trail-ready with the EC-EN100 Di2 Charger — a compact, easy-to-use charger designed to top up your Di2 battery quickly and efficiently, ensuring you’re always powered for the next ride.

Technical Specifications

Speed: 12-speed
Rear Derailleur: RD-M8250
Cage Options: GS (medium) / SGS (long)
Max Sprocket Compatibility: GS (9–45T) / SGS (10–51T)
Shifter: SW-M8250-R (wireless, powered by 2× CR1632 batteries)
Mounting Options: I-SPEC EV or Band-On Clamp
Battery Life: Up to 340 km per charge (310 mAh battery capacity)

Type	Groupsets
Speed	12 Speed
SKU	464211