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Shimano Authorized Retailer FIST Certified

Shimano JC40 Di2 External Frame Junction Box 4-Port

Availability:In Stock (17 Available)
Your Price:$29.99

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AEBike Part Number: CY6760
Manufacturer:  Shimano
Manufacturer Part Number: ISMJC40
UPC: 689228827448

Shimano Di2 Frame Junction Box
  • Use Di2 system checker to update component firmware from
  • Frame Junction Box connects via SD50 E-tube wires to four different points: front derailleur, rear deailleur, 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
  • Mounts underneath the bottom bracket shell
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