Shimano SM-JC40 Di2 External Frame Junction Box 4-Port

$35.23 Regular price $58.95
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by Shimano
Low stock - 6 in stock, ready to ship

Shimano Di2 Frame Junction Box

  • Mounts underneath the bottom bracket shell
  • 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
  • MPN: ISMJC40
  • UPC: 689228827448

  • SKU: CY6760