Shimano Di2 SM-JC41(B) Junction Box(Internal)


3 in stock


SKU: SMN05005 Category:


This is the Shimano Ultegra Di2 Internal Junction Box.
This box is referred to as the junction box “B” on a Di2 build.
The SM-JC41 is for use with internal wiring setups and is the main center of e-tube Di2 systems.

Exclusively for Di2 E-tube electronic shifting systems

Additional information

Weight 0.05 kg
Dimensions 11 × 6 × 4 cm