Shimano E-Tube Di2 Junction Box

This junction box is specifically designed for use with Shimano Di2 systems that utilize EW-SD50 wires. It is not compatible with the newer, thinner EW-SD300 wires found on the latest 12-speed Di2 groupsets.

Yes, this junction box features an integrated charging port. You can plug your Shimano Di2 charger directly into this unit to charge your internal battery without needing to remove it from the frame.

The junction box includes a built-in LED battery level indicator. It provides real-time monitoring, so you can check your charge status with a quick glance at your stem area before or during a ride.

Yes, this junction box allows you to enter adjustment mode. You can fine-tune your gear indexing directly through the shifter buttons, making it easy to perform micro-adjustments on the road or in your garage.

Absolutely. It is designed with weather-resistant connectors and a robust housing to ensure your electronic shifting system remains protected and reliable, even when riding in rain or damp conditions.

Yes, this unit is specifically designed to mount cleanly to the stem. This placement keeps your cockpit tidy and ensures the junction box is easily accessible for charging and indexing adjustments.