Shimano EW-SD 50 Electric Wire, BLACK

The Di2 EW-SD50 Wires are the "E-Tube cables" for Shimano's Ultegra 6770, 6870, r8000 and Dura-Ace 9070 and r9100 groupsets. They're used to connect each of the electronic components within either system.

You'll need four of these to connect the Front Wire/Junction (A) to the Rear Junction Box (B), Battery, Front and Rear Derailleurs (all sold separately). r8000 and r9100 groupsets require 6 total, so plan accordingly.

These are sold individually. To recap, four wires are required per bike for previous Ultegra versions, and six wires are required per bike for current Ultegra and Dura-Ace, r8000 and r9100 groupsets. Choose from various lengths for a perfect fit*. Compatible with internally or externally routed systems. The SM-GM01 and SM-GM02 Rubber Grommets are recommended for frames with internal cable routing. For external routing, add the SM-EWC2 Wire Covers for an additional aesthetic touch.

*Note: Additional wire slack can be taken up at the Rear Junction (B). When in doubt, it's best to order a slightly longer wire.