Sometimes a Di2 wire is 50mm too short and there's no elegant solution other than starting over with longer cables. The EW-JC200 fixes that problem. It's a simple inline connector with two E-Tube ports that lets you join two SD50 wires together, effectively extending your reach by roughly 30mm while adding a connection point wherever you need it. If you're swapping a groupset between frames, building up a larger bike, or running satellite shifters that complicate the cable routing, this is the part that keeps you from buying an entirely new set of wires.

The design is straightforward: two female SD50 ports in a compact housing that sits cleanly inside frame tubing. You plug one wire into each side, and the junction passes the signal through. The connectors are water-resistant and use the same positive-click engagement as all E-Tube connections, so you get the same reliability as a direct wire run. Once it's tucked into the frame, you won't know it's there.

Common use cases go beyond just extending wire length. The EW-JC200 works well when you're adding a bar-end junction box with an EW-JC130 Y-connector and need an extra connection point to make the routing work. It's also useful for tandem builds where the stoker's controls need to reach the captain's drivetrain, or for triathlon setups where you're running extension-mounted shifters in addition to the base bar controls. Any time the standard wire lengths don't quite reach or you need to create a splice point mid-run, this connector handles it.... Read More