Shimano SMJC41 Junction Box for Ultegra Di2

The Shimano SMJC41 Junction Box for Ultegra Di2 is a component designed for electronic shifting systems in road bicycles. It serves as a central connection point for Di2 wiring, enabling efficient communication between shifters, derailleurs, and the battery. This junction box is intended for use with Shimano Ultegra Di2 electronic groupsets and is typically installed inside the bicycle frame for a clean setup.

• Compatible with Shimano Ultegra Di2 electronic shifting systems
• Functions as an internal junction box for E-Tube wiring
• Supports up to four E-Tube wire connections
• Designed for internal frame installation
• Constructed from durable plastic material
• Compact and lightweight design
• Black color finish
• Shimano part number: SM-JC41

This junction box is a passive component and does not contain a battery or active electronics. It is essential for organizing and connecting Di2 wires within compatible frames.

Available Variants: