Ultegra Di2 External Routing Junction Box For Waterproof Wiring Under Bottom Bracket Mount Secure Di2 Cable Interconnection Ideal For Externally Routed Di2 Systems Not Compatible With Dura Ace Di2

External routing junction box for Ultegra Di2 wiring
✔️ single unit mounts under bottom bracket for extern wired Di2

The junction box is a waterproof housing that neatly connects Di2 system wiring for externally routed setups. It is typically mounted under the bottom bracket area to keep cables tidy, protected, and ready for quick maintenance.

✅ Mounts beneath the bottom bracket shell for clean external routing
✅ Provides secure, waterproof interconnection of Di2 wiring
✅ Supports externally wired Di2 configurations, linking front/rear derailleurs, shifters, and battery
✅ Not compatible with Dura-Ace Di2

💡 What is a Di2 junction box used for in externally routed systems? A handy rundown for buyers considering this component.
- Di2 wiring interconnection is centralized and sealed to protect against moisture
- Mounts under the bottom bracket area to keep cables neat and protected
- Supports externally wired Di2 configurations, connecting front/rear derailleurs, shifters, and battery
- Not compatible with Dura-Ace Di2; check system compatibility before buying

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