Zoom the image with the mouse
| Fast Shipping | Free Shipping On Orders Over $99 |
|---|---|
| Price Match | Contact Us Here |
| Easy Returns | Info Here |
| Payment Options | Interest FREE Options Over $30 |
| Pushys ID | 51348 |
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 centre of e-tube Di2 systems.
. Frame Junction Box connects via SD50 E-tube wires to four different points: front derailleur, rear derailleur, cockpit junction box and battery mount
. All Di2 components on the bicycle require the same firmware version
. Using Di2 components with different firmware versions may cause malfunctions