The Shimano XTR SC-M9051 is the central hub of a Shimano XTR Di2 electronic drivetrain — combining a system information display, Junction-A wiring hub, and charge port in a single handlebar-mounted unit. It shows current gear position and battery level at a glance, and its integrated Bluetooth and ANT+ wireless connectivity makes it essential for enabling Synchronized Shift mode on XTR Di2 builds.

Highlights

• System information display: Shows gear position and Di2 battery level in real time so you always know your system status on the trail.
• Junction-A with 3 E-Tube ports: Routes power and signal to up to three E-Tube components, simplifying your Di2 wiring.
• Integrated charging port: Charge your Di2 battery via the SC-M9051 without dismantling the system — compatible with the SM-BCR2 charger.
• Bluetooth and ANT+ wireless: Pairs wirelessly with head units and the E-TUBE PROJECT app for configuration and firmware updates.
• Synchronized Shift ready: Required component for enabling Synchronized Shift mode on XTR Di2 drivetrains.
• Dual clamp compatibility: Includes clamps for both 31.8mm and 35mm handlebars so it fits modern and traditional bar diameters.
• Lightweight: Weighs just 30g — minimal penalty for maximum electronic intelligence.

System Integration

The SC-M9051 sits at the heart of the XTR Di2 system, acting as both the display interface and the primary wiring junction. Three SD50 E-Tube port connections distribute power and communication signals to your derailleurs and other Di2 components. The single-button interface allows straightforward mode switching, and the display readout keeps critical system data visible without reaching for your head unit.

Wireless Connectivity

Built-in Bluetooth and ANT+ wireless allow the SC-M9051 to sync with cycling computers and the Shimano E-TUBE PROJECT app (iOS and Android). Use the app to customise shift modes, update firmware, and configure Synchronized Shift settings. Note that the wireless function operates exclusively — it cannot run simultaneously with a separate wireless unit on the same Di2 system.

Compatibility & Fit

Designed for the Shimano XTR M9050 Di2 groupset (11-speed). Compatible with E-TUBE batteries BT-DN110 (internal) and BM-DN100 (external mount) — not compatible with older Di2 battery generations. Handlebar clamp diameter: 31.8mm and 35mm (both clamps included). Charges via SM-BCR2 charger (sold separately). Functionally compatible with the E-TUBE PROJECT software ecosystem.