Shimano JC41 Di2 Internal Frame Junction Box 4 Port

Shimano Di2 Frame Junction Box Frame Junction Box connects via SD50 E-tube wires to four different points: front derailleur, rear derailleur, cockpit junction box and battery mount All Di2 components on the bicycle require the same firmwar ...(Read More)

$30.99
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Shimano Di2 Frame Junction Box

Frame Junction Box connects via SD50 E-tube wires to four different points: front derailleur, rear derailleur, 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/

Part Numbers

UPC MPN
00689228827462 ISMJC41