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Di2 Junction box mount

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Old 05-05-19, 08:46 AM
  #1  
deepakvrao
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Di2 Junction box mount

The type that attaches to your steerer. Any suggestions between these 2 types? And, for a 6 degree stem, would it be better to buy a 7 degree mount if I want to mount it just below the stem?

https://www.aliexpress.com/item/Four...AbTest=ae803_5

https://www.aliexpress.com/item/28-6...85c5b5d31aeb-0
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Old 05-05-19, 09:25 AM
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noodle soup
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Originally Posted by deepakvrao
The type that attaches to your steerer. Any suggestions between these 2 types? And, for a 6 degree stem, would it be better to buy a 7 degree mount if I want to mount it just below the stem?

https://www.aliexpress.com/item/Four...AbTest=ae803_5

https://www.aliexpress.com/item/28-6...85c5b5d31aeb-0
I would get a 7 degree mount, but neither of the ones you posted, unless you have a 31.8mm steerer tube.

this one should work fine.

https://it.aliexpress.com/item/Fouri...e4d1331144d9-8
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Old 05-05-19, 09:28 AM
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I use a Fouriers. Works great. Depending on your stem geometry, you may need a spacer between the mount and the stem anyway.
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Old 05-05-19, 09:40 AM
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Originally Posted by noodle soup
I would get a 7 degree mount, but neither of the ones you posted, unless you have a 31.8mm steerer tube.

this one should work fine.

https://it.aliexpress.com/item/Fouri...e4d1331144d9-8

Chose those as my new Canyon has that odd 1 1/4 steerer. That's 31.8 I think.
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Old 05-05-19, 09:41 AM
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Originally Posted by Marcus_Ti
I use a Fouriers. Works great.
+1

It cleans up the stem by eliminating the silly black plastic band.
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Old 05-05-19, 09:41 AM
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Originally Posted by deepakvrao
Chose those as my new Canyon has that odd 1 1/4 steerer. That's 31.8 I think.
Is it 1.25straight bore, or tapered? I'd expect tapered, but companies do dumb proprietary things....
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Old 05-05-19, 09:42 AM
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Originally Posted by deepakvrao
Chose those as my new Canyon has that odd 1 1/4 steerer. That's 31.8 I think.
That is odd. it severely limits the choice of stems.
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Old 05-05-19, 09:45 AM
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Originally Posted by Marcus_Ti
Is it 1.25straight bore, or tapered? I'd expect tapered, but companies do dumb proprietary things....
This is the stem. It clearly says 1 1/4. Then again, I'm not too great on all these specs.

https://www.canyon.com/en-in/gear/co...laenge=90%20mm
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Old 05-05-19, 12:26 PM
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Originally Posted by deepakvrao
This is the stem. It clearly says 1 1/4. Then again, I'm not too great on all these specs.

https://www.canyon.com/en-in/gear/co...laenge=90%20mm
As seen IRL... 6 degree stem and mount, I needed a spacer
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Old 05-06-19, 05:01 PM
  #10  
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Originally Posted by Marcus_Ti
I use a Fouriers. Works great. Depending on your stem geometry, you may need a spacer between the mount and the stem anyway.
Same here, works well.
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Old 05-06-19, 07:57 PM
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Also have the Fouriers. It does the job. Great little device
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Old 05-06-19, 08:03 PM
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Originally Posted by motosonic

Also have the Fouriers. It does the job. Great little device
What is the material that is made of? Curious as to why it is not parallel to the stem? Can it be bent?
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Old 05-06-19, 08:43 PM
  #13  
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I’m just puzzled that ya’ll find that the stem adapter looks better than the rubber band thing Shimano provides.

To each his own I guess.
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Old 05-06-19, 09:09 PM
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Originally Posted by Steve B.
I’m just puzzled that ya’ll find that the stem adapter looks better than the rubber band thing Shimano provides.

To each his own I guess.
Neater from the top I guess.

Wondering if I should just stick that box underneath the stem with double side tape. Probably the cleanest solution? I've got a square profile stem too.
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Old 05-06-19, 09:25 PM
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The stock band looks way better...IMO
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Old 05-06-19, 10:07 PM
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It weird shimano didnt figure out a neater solution to this. The box with the band sticks out like a sore thumb, but the bracket is no better.

Last edited by Racing Dan; 05-06-19 at 11:18 PM.
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Old 05-06-19, 10:21 PM
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Originally Posted by Racing Dan
It weird shimano didnt figure out a neater solution to this. The box with the band sticks out like a sore thumb.
The bar end junction box is much cleaner, but it doesn't work for everyone.
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Old 05-06-19, 10:44 PM
  #18  
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Originally Posted by noodle soup
The bar end junction box is much cleaner, but it doesn't work for everyone.

Would have loved that, but I use a bar end mirror, and I use right in India, and left when abroad, so can't block the bar end.
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Old 05-06-19, 11:30 PM
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Originally Posted by Racing Dan
It weird shimano didnt figure out a neater solution to this. The box with the band sticks out like a sore thumb, but the bracket is no better.
think they have most of this years bikes have it built into the frame at least the few bikes I took out for a test ride and many more in the store had them built into the frame
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Old 05-07-19, 03:51 AM
  #20  
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Finally decided to just stick the mount under the stem. So, would you guys suggest Sugru or Blu Tac. Would Blu tac hold?
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Old 05-07-19, 04:20 AM
  #21  
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Originally Posted by deepakvrao
Would have loved that, but I use a bar end mirror, and I use right in India, and left when abroad, so can't block the bar end.
you are the person I had in mind when I said it doesn't work for everyone.
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Old 05-07-19, 06:03 AM
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Originally Posted by deepakvrao
What is the material that is made of? Curious as to why it is not parallel to the stem? Can it be bent?
It's some sort of composite material. I assume it's not parallel because it would then interfere with those stems that people "slam". My stem just so happens to have a decent up angle on it so there's more space. The stem the bike came with was quite the opposite and you could barely see a space between them.
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Old 05-07-19, 06:05 AM
  #23  
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Originally Posted by motosonic
It's some sort of composite material. I assume it's not parallel because it would then interfere with those stems that people "slam". My stem just so happens to have a decent up angle on it so there's more space. The stem the bike came with was quite the opposite and you could barely see a space between them.
Can you not mount the junction box to either side of the mount? I know that that would put the logo upside down, but flipping the mount would be the lesser evil, to my eye.
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Old 05-07-19, 07:08 AM
  #24  
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Originally Posted by WhyFi
Can you not mount the junction box to either side of the mount? I know that that would put the logo upside down, but flipping the mount would be the lesser evil, to my eye.
I think that is a 17* mount with a 6* stem?

Last edited by deepakvrao; 05-07-19 at 08:08 PM.
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