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Shimano
Di2 EW-SD50 E-Tube Wire

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MSRP:$25.99
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The Di2 EW-SD50 Wires are the "E-Tube cables" for Shimano's Ultegra 6770 and Dura-Ace 9070 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). Dura-Ace requires two additional wires because the shifter control wires are not integrated into Front Junction Box (A) as they are with Ultegra.

These are sold individually. To recap, four wires are required per bike for Ultegra, and six wires are required per bike for Dura-Ace. 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.

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Mandatory
by Doug
Competitive Racer
New Jersey, USA

I think this should be required for any bike with Di2. Who wants to look at blinking lights to see if your battery is flat? Also enabling the little buttons under the brake hoods is convenient if your Garmin screen andor hands are wet. Only downside, this stuff is expensive for what it is.

Reviewed 8/15/2019
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Was just the rt length for my bars
by Brettmac

Installed clean and easily

Reviewed 7/2/2018
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