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Shimano E-Tube Di2 Junction-B Box

Shimano E-Tube Di2 Junction-B Box

Item #: SHM12064
Regular price: $29.99
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This Shimano Di2 junction box is needed for all parts of the Di2 system to communicate with each other.

  • Frame Junction Box connects via SD50 E-tube wires to four different points: front derailleur, rear deailleur, cockpit junction box and battery mount.

  • How to measure a frame for SD50 wires

  • All Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions

    Features:
  • Internal junction box is meant to be hidden inside the frame
  • External junction box is meant to be attached to the ouside of the bottom bracket shell