I recently got Dura Ace Di2 on one of my bikes. While trying to take the junction box off below my stem (to move it slightly), the clip that the strap connects to broke. Does anyone know where I can get a replacement part, and what the part # is?
I think the junction box I have is: Shimano E-Tube Cockpit Junction Box - SM-EW90 A/B
Use black electrical tape and attach it to your rear brake cable. Run heat shrink tubing from each shifter with the brake cable and shifter wire inside. It looks nicer than hanging under your stem.
If you're using a Garmin, I'm using the Barfly 2.0 mount to hold it and the junction box. Looks pretty clean this way, especially compared to the strap method.
I like that idea to attach it to the Barfly. Just got my first Di2 bike a few days ago. I removed the strap around the stem and used a piece of thick double-sided tape to place the box back under the stem. Much cleaner. Maybe try the garmin mount location next time.
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