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Features
- Frame Junction Box connects via SD50 E-tube wires to four different points: front derailleur, rear derailleur, cockpit junction box and battery mount
- Precision-engineered to seamlessly connect four key Di2 components-including front and rear derailleurs, cockpit junction box, and battery mount-streamlining electrical management within your bike frame.
- Utilizes advanced SD50 E-tube wiring technology for clean, efficient signal transmission and straightforward installation, optimizing internal cable routing for a sleek bike aesthetic.
- Compatible with Di2 electronic shifting systems, supporting firmware synchronization across all connected components to prevent malfunctions and maintain optimal shifting performance.
- Features innovative internal mounting design allowing discreet integration within the bicycle frame, enhancing bike aesthetics while providing easy access for updates via the Di2 system checker tool.
Description
The Shimano Ultegra Di2 Junction Box is what is referred to as the B Junction. This is the point in the wiring system where all the component pieces converge. It's a crucial item along with the five required wire sections to operate your Ultegra Di2 drivetrain.The Ultegra Di2 Junction Box is available in two configurations -- Internal and External. The Internal style is designed to be located inside the bike frame (usually inside the down tube, tucked in from a hollow bottom bracket shell). The External version is designed to be fixed on the outside of the bottom bracket shell, usually fastened to the cable guide. Product FeaturesMaterial: plasticType: Crankset Compatibility: 2 x 10Compatible Components: Shimano Ultegra Di2Weight: Recommended Use: ditching your mechanical tethersManufacturer Warranty: 2 years
Material: Plastic
Brand: SHIMANO
Color: One Color
Style: Junction Box
Finish Type: Natural
Brand Name: SHIMANO
Model Number: ISMJC41
Manufacturer: Shimano
Item Highlight: SM-JC41 Di2 Internal Frame Junction Box - 4-Port E-Tube Connector
Number of Items: 1
Unit Count: 1 Count
Warranty Description: Limited Warranty
UPC: 689228827462
Included Components: Junction Box
Part Number: 6055
Color: One Color
Style: Junction Box
Finish Type: Natural
Installation Type: Screw-In
Material: Plastic
Capacity: 1 fluid ounces
Frequently asked questions
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