Shimano Ultegra Di2 Junction Box
SAVE 19% $24.99 $30.99
As an improvement over the Dura-Ace Di2 setup, the Ultegra Di2 group uses a junction box to simplify the wiring, giving you a cleaner look with easier setup. The junction box mounts under your bottom bracket shell (for external wiring) and connects the wires coming from the derailleurs, levers and battery.
- Junction box mounts under your bottom bracket shell
- Provides a secure, waterproof connection for your wiring
- Compatible with externally-wired Ultegra Di2 setups
- Not compatible with Dura-Ace Di2