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  • Shimano - E-Tube Di2 Junction Box - One Color

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  • Shimano - E-Tube Di2 Junction Box - One Color

Shimano E-Tube Di2 Junction Box

sale from $20.71 $27.9926% Off

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    • One Color, External/SM-JC40
      sale $26.03
    • One Color, Internal/SM-JC41
      sale $20.71

    3 Reviews


    It’s time to connect.

    Shimano’s E-Tube Di2 Junction Box (also known as the B junction) connects all your component and battery wires to make assembly much easier. It's a crucial item along with the five required wire sections to operate your Ultegra 6770, Ultegra 6870, or Dura-Ace 9070 Di2 shift system. The E-Tube Di2 Junction Box is available in two configurations: Internal (SM-JC41) and External (SM-JC40).

    • Connects Di2 cycling component and battery wires
    • Available in external or internal configurations
    • Shimano's Di2 is the most popular electronic drivetrain in the pro ranks
    • Item #SHI0394

    Tech Specs

    Crankset Compatibility
    2 x 10
    Compatible Components
    Shimano Ultegra Di2
    Recommended Use
    ditching your mechanical tethers
    Manufacturer Warranty
    2 years

    Tech Specs

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