Shimano
JC40 Di2 External Frame Junction Box 4-Port

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$33⁹⁹

orig: $35⁹⁹ save 6%

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$37⁸⁸

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Frame Junction Box connects via SD50 E-tube wires to four different points: front derailleur, rear deailleur, cockpit junction box and battery mount

All Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions
Use Di2 system checker to update component firmware from http://e-tubeproject.shimano.com/
Mounts underneath the bottom bracket shell

UPC

689228827448

MPN

ISMJC40

Tree Fort ID:

333222381600

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