Home Page

Cart, contains 0 items

When autocomplete results are available use up and down arrows to review and enter to select. Touch device users, explore by touch or with swipe gestures.
Expert Help
Earn Rewards
  • Just In
  • Learn

Shimano
E-Tube Di2 Junction Box

Be the first to review
Current price: $26.70 - $28.81 Original price: $32.99
Up to 19% off

Style & Size:

Size Chart

Quantity


Where the wires converge.

The E-Tube Di2 Junction Box is what is referred to as the B Junction. This is the point in the wiring system where all the component pieces converge. 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). The Internal style is designed to be located inside the bike frame (usually inside the down tube, tucked in from a hollow bottom bracket shell). The External version is designed to be fixed on the outside of the bottom bracket shell, usually fastened to the cable guide.


Details

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

What do you think about this product?

View

Selecting an option will reload the available reviews on the page

Sorry, we don’t currently have any of those types of reviews for this product.