Shimano SM-JC41 Internal X4 E-Tube Port Ultegra Di2 Frame Junction Boxe

$32.99

-Frame Junction Box connects via SD50 E-tube wires to four different points: front derailleur, rear derailleur, cockpit junction box and battery mount -External Junction Box mounts underneath the bottom bracket shell

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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
External Junction Box mounts underneath the bottom bracket shell
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/

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Shimano SM-JC41 Internal X4 E-Tube Port Ultegra Di2 Frame Junction Boxe

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