shop by category
help center
call 888.293.3934
M-F 10am-7pm EST

Menu Button
Call Mon-Fri 10am-7pm EST 888.293.3934
  • swim
    • view all Swim products
    Triathlon WetsuitsSwim Training Equipment
  • bike
    • view all Bike products
    Time Trial Aero HelmetsTriathlon Packages
  • run
    • view all Run products
    All Winter Run GearTriathlon  Sunglasses
  • clothing
    • view all Clothing products
    Winter ClothingCompression Clothing
  • nutrition
    • view all Nutrition products
    All SupplementsAll Energy Gels & Chews
    Training Equipment
    • view all Training Equipment products
    Lubricants & Body CareBooks & DVDs
  • electronics
    • view all Electronics products
    Bike Lighting SystemsBike Computers
  • USAT Store
Shimano E-Tube Di2 Junction-B Box
  • Shimano E-Tube Di2 Junction-B Box
  • Shimano E-Tube Di2 Junction-B Box

Shimano E-Tube Di2 Junction-B Box

Item #: SHM12064 Usually ships in 2-3 business days
Price: $27.99
Add to Favorites
product description
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

  • 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

  • reviews
    Shimano E-Tube Di2 Junction-B Box
    Customer QA
    Ask a Question About This Product
    you may also like