Shimano Di2 Junction-B Box

As low as $32.99
Di2 Junction-B Box SM-JC40 External
SKU:
SSFHXP65
In stock
Leave a review

There are currently no videos for this product. Keep checking back for updates!

Shimano Di2 offers the most precise and reliable shifting imaginable, at the push of a button. Adjust the derailleurs once, and the intelligent, auto-trimming system returns derailleurs to the same position every time. The intuitive and user-friendly design can be set up at home and accommodates any frame; new or old.

The Shimano Di2 SM-JC4 junction box connects the electric wires from the rear derailleur, front derailleur, battery, and shift levers. There are two types, external (mounted under the bottom bracket) and internal (for Di2 compatible frames.)
More Information
Brand Shimano
Product Condition New in Box