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Black Friday Sale up to 50% off selected items. Cart item for final discount pricing.

Now through December 15th

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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