Free Shipping on Orders Over $99

Free Shipping Policy

Free Shipping applies to all orders placed for $99 and above
(pre-tax value). Some restrictions apply:

  • Offer valid in the Lower 48 States only
  • Excludes Travel Cases and some other oversize items (prices can be calculated in the cart before checkout)
Take 10% off first full priced item with: TAKE10


Offer valid for 10% off qualifying items.

Some exclusions apply.

For questions, contact us by calling 1.800.627.6664 or Chat Now

Shimano Di2 E-Tube SM-JC40 External Junction Box

The Shimano E-Tube Di2 SM-JC40 External Junction Box goes underneath the bottom bracket and mounts where a cable guide is usually located. The included screw threads into the hole that is normally used for the cable guide mounting screw. The Junction box is aptly named as four Di2 E-Tube wires emanate from the Junction Box.


  • 10 grams
  • Includes mounting screws
  • Attaches to bottom bracket cable guide mount

Item is in stock


No reviews. Be the first. Write Review