![Shimano SM-JC41 Di2 Internal Junction B Box - CCACHE](http://ccache.cc/cdn/shop/products/shimano-sm-jc41-di2-junction-b-box-internal_114x144_crop_center.jpg?v=1582898887)
![Shimano SM-JC41 Di2 Internal Junction B Box - CCACHE](http://ccache.cc/cdn/shop/products/shimano-sm-jc41-di2-junction-b-box-internal-packaging_114x144_crop_center.jpg?v=1582898887)
For internal DI2 wire routing, SHIMANO's SM-JC41 Junction B is the central connector for DI2 systems. Wires from the front and rear derailleurs, cockpit area, and battery all plug into the 4-port SM-JC41 junction, which is housed inside the bike frame.
Specifications
For internal wire routing
Mfr Claimed Weight
4.1g
For internal DI2 wire routing, SHIMANO's SM-JC41 Junction B is the central connector for DI2 systems. Wires from the front and rear derailleurs, cockpit area, and battery all plug into the 4-port SM-JC41 junction, which is housed inside the bike frame.
Specifications
For internal wire routing
Mfr Claimed Weight
4.1g