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

Save $10.92
ShimanoSKU: CY6760

Sale price$39.88 Regular price$50.80


Shimano SM-JC40 Di2 External 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 firmware version. Using Di2 components with different firmware versions may cause malfunctions
  • Use Di2 system checker to update component firmware from
  • Shipping & Delivery

    All new bikes are in-store pickup only, all bikes on closeout are available to ship. See shipping at checkout for more details.

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