The Shimano SM-JC41 E-tube Di2 bottom bracket junction is designed for internal wire routing in electronic Di2 shifting systems. It serves as a central connection point for the rear and front derailleurs, battery, and the cable that leads to the battery indicator junction box123.
Key Features
- Internal Wire Routing: This junction is designed to be positioned inside the frame tubing for a clean, aerodynamic setup13.
- Connectivity: It connects the rear and front derailleurs, battery, and the cable to the battery indicator junction box13.
- Water Resistance: The connectors are designed to be water-resistant, ensuring reliable performance in various conditions13.
- Color: typically black
