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.
B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.
The product weight specified is an approximate weight based on the manufacturer's specifications (if available) or our measurement of one or two examples. For most products, the weight will typically vary by 5% to 10%.
Weight: 204 grams
Mfg PartNum: IEWSD50L15
Mfg PartNum: IEWSD50L20
Mfg PartNum: IEWSD50L25
Mfg PartNum: IEWSD50L30
Mfg PartNum: IEWSD50L35
Mfg PartNum: IEWSD50L40
Mfg PartNum: IEWSD50L50
Mfg PartNum: IEWSD50L55
Mfg PartNum: IEWSD50L60
Mfg PartNum: IEWSD50L65
Mfg PartNum: IEWSD50L70
Mfg PartNum: IEWSD50L75
Mfg PartNum: IEWSD50L80
Mfg PartNum: IEWSD50L85
Mfg PartNum: IEWSD50L95
Mfg PartNum: IEWSD50L100
Mfg PartNum: IEWSD50L120
Mfg PartNum: IEWSD50L140
Shimano Di2 EW-SD50 E-Tube Wires; YOU NEED about 6 or 7 various lengths. All the components clip together:
It helps to understand the lengths you require, longer is better, if you have room to stuff extra in down-tube. The line through your handlebars may be longer.
Counted 6 wires: In the SEAT TUBE, Battery-WIRE-wireless transmitter-WIRE-Junction Box- Wire-Rear Derailleur. Same Junction Box -WIRE-Plug in device-WIRE-R Shifter- Wire- L Shifter
YES, To connect SHIFTERS: I drilled 2 exit holes (near the plug end) in my carbon handle bars, maybe 8cm from end (Mad Man) or consider other handle bars.
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.