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PostPosted: Sat Feb 15, 2014 11:31 pm 
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Today I rode with a friend who just installed Ultegra Di2 11spd. The wiring is internal and goes through the downtube. Trouble is, it's rattling like crazy inside and very annoying. How do you guys who run electric deal with this? Zip ties internally? Perhaps the wires are too long and too slack inside? Don't really want to take all the slack out for fear of putting stress on the junction points. Just curious. Thx.

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Posted: Sat Feb 15, 2014 11:31 pm 


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PostPosted: Sat Feb 15, 2014 11:38 pm 
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All the internal wires should have zip ties or Shimano has the ones that just clip on. That pretty much eliminates the noise and pretty easy to fix.


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PostPosted: Sun Feb 16, 2014 12:27 am 
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Just put zip ties on the cables, leaving the 'tails' long. They curl up and press the cable against the tube. The tension from the 'tail' keeps the cable in-place and (largely) rattle-free.


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PostPosted: Sun Feb 16, 2014 12:34 am 
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Yeah zip ties for sure. Did my own install with them and had no rattles, well none from the di2 cables!


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PostPosted: Sun Feb 16, 2014 12:49 am 
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Thanks all, yes... I assumed the zip tie thing and leaving the tails long etc as Geoff explained. That's what I suggested but it seemed there might still be some movement and the occasional rattle. But that's better than how it currently is. Then I assume you need two or three throughout the tube. I'll pass it on and see how it goes.


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PostPosted: Sun Feb 16, 2014 12:58 am 
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I have no zip ties and it doesn't rattle at all.

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PostPosted: Sun Feb 16, 2014 1:41 am 
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Sometimes I've found the internal junction ( its the little black rectangular box that connects 4 cables) is the noise maker. On some installs I've had to wrap it in foam.


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PostPosted: Sun Feb 16, 2014 5:39 am 
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If its the internal junction box, a small blob of Bluetack will solve the problem.


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PostPosted: Sun Feb 16, 2014 7:18 am 
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I have internal di2 on three bikes... never heard a rattle from any of them.

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PostPosted: Sun Feb 16, 2014 10:03 am 
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After several frames with no problems, I had one where I seemed to wear the cable on one internal frame hole. I finally got a 9 foot roll of 3/16" heat shrinkable tubing from Home Depot and ran each cable through it, and then had a short piece of 1/2" diameter tubing that I slipped over all the internal cables plus the internal junction box. I shrank the wider piece over the junction box so it held everything reasonably firmly, and shrank the ends of the smaller tubing not so it sealed but so it would help keep any moisture out. The tubing was really helpful in making everything neat and protecting the bits of extra wiring inside the frame. It certainly added enough mass to the wire so it hasn't bounced around and made any noise. I'd also had the internal junction box make some noise on one install, and this preventive measure helped with everything. Total weight added was around 15 grams.


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Posted: Sun Feb 16, 2014 10:03 am 


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