Shimano SM-JC41 Junction-B (Di2 Spec) – Integrated Connector for Di2 Internal Wiring

The Shimano SM-JC41 Junction-B (Di2 Spec) is the central connector designed for Shimano Di2 electronic shifting systems with internal wiring. Installed inside the bicycle frame, this component ensures a secure and efficient connection between all elements of the Di2 system.

The SM-JC41 junction features 4 ports, to which cables from the derailleur, shifter, cockpit, and battery are connected. Thanks to its integrated configuration, it helps keep the wiring tidy, protected, and completely hidden within the frame, improving both the aesthetics and reliability of the system.

Key Features

• Model: Shimano SM-JC41
• Type: Junction-B (Di2 Spec)
• Installation: Built-in type (integrated into the frame)
• Compatibility: Shimano Di2 Systems
• Number of ports: 4
• Function: Central connector for connecting derailleur, shifter, cockpit, and battery
• Designed for: Internal cable routing