Shimano E-Tube Di2 SM-JC41 Internal Junction Box
The Shimano E-Tube Di2 SM-JC41 Internal Junction Box is used for all applications except mounting underneath the bottom bracket to the cable guide mount where the External Junction box would be used. The Junction box is aptly named as four E-Tube Di2 wires emanate from the Junction Box.
- 10 grams
- Joins all 4 connecting wires