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Internal Cable Routing Issue on CF Drop Bars

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Internal Cable Routing Issue on CF Drop Bars

Old 03-04-18, 06:51 PM
  #1  
dksix
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Internal Cable Routing Issue on CF Drop Bars

I have a set of made in China bars which have internal cable routing. These have the single entry hole on the inside of the bend not 2 holes on both inside and outside like some. My issue is that the entry hole is not large enough to accept both the brake and shift cable housing. The existing entry holes lines up perfectly with the brake housing once inserted in place in my Ultegra 6700 STI's but even if the hole in the bars were bigger it would be forcing the shift housing into a couple of bends that I feel would be less than ideal.

I'm using Shimano road 5mm brake housing and of course the corresponding cables and Shimano SP41 road shifting cable/housing (which I believe is 4mm housing).

I have the brake cables installed and they are great. No excessive force required to pull the cable nor hesitation upon release, the routing doesn't seem to have created any extra drag.

I could run the shift cables externally and wrap as normal but I hadn't planned to wrap the aero flats on these bars to start. I'm really hesitant to grind to opening in the bars larger and I certainly don't want to make a hole on the outside of the bend where the shift cable should enter into the bars.

I'm looking for some advice on what others would do in this situation. I've taken some pictures to post and will link a similar set of handle bars.









https://www.ebay.com/itm/UD-Full-Car...gHXi3KrbQWUJXA
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Old 03-04-18, 08:33 PM
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TimothyH
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Looks like that bar might be designed specifically for electronic shifting.

It would work nice with a bar-end A junction. E-Tap would render the problem moot.


-Tim-
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Old 03-04-18, 08:46 PM
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I'd send them back for a refund.
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Old 03-04-18, 08:58 PM
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I'd external route the shift cable

Originally Posted by Jicafold View Post
I'd send them back for a refund.
Cheaper to bin the bars than return ship them....
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Old 03-05-18, 07:30 AM
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Originally Posted by Marcus_Ti View Post
I'd external route the shift cable



Cheaper to bin the bars than return ship them....
If this was an Ebay purchase then you can file a claim with Ebay stating that the item was not as described. That = full refund including shipping.
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Old 03-05-18, 07:37 AM
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Originally Posted by Jicafold View Post
If this was an Ebay purchase then you can file a claim with Ebay stating that the item was not as described. That = full refund including shipping.
Return shipping to China will take 30 days. So if you're hot to get your money back...it'll be next month. Presuming your claim is authorized, and the listing pictures don't match the item.

For what Made in China carbon bars cost...how worth the wait is, is a matter of debate.
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Old 03-05-18, 08:00 AM
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Originally Posted by Jicafold View Post
I'd send them back for a refund.
Originally Posted by Jicafold View Post
If this was an Ebay purchase then you can file a claim with Ebay stating that the item was not as described. That = full refund including shipping.
Originally Posted by Marcus_Ti View Post
Return shipping to China will take 30 days. So if you're hot to get your money back...it'll be next month. Presuming your claim is authorized, and the listing pictures don't match the item.

For what Made in China carbon bars cost...how worth the wait is, is a matter of debate.
Originally Posted by Jicafold View Post
I'd send them back for a refund.
I don't consider this an issue the seller tried to cover up or misrepresent, I assumed the routing holes were sufficient. Buying from China has it's inherent risks and I feel that I'm not owed a refund. And even if I did, I bought the bars back in October and am just now getting around to installing them. Aside from this issue these feel like good sturdy bars. I had bought a set of China once before and wouldn't even mount them up from fear of failure. These things are rigid and I do like the shape and feel from what I've been able to sit on the bike.

I'm going to use the bars, just looking for advice (hopefully suggestions that haven't yet occurred to me) on how best to route the shifting cables.
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Old 03-05-18, 08:03 AM
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Originally Posted by TimothyH View Post
Looks like that bar might be designed specifically for electronic shifting.

It would work nice with a bar-end A junction. E-Tap would render the problem moot.


-Tim-
I really like this bike, at least enough that I can't justify a new one but my next new one will be Di2 electronic and hydro.
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Old 03-05-18, 11:22 AM
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Run on exterior.

Why don't you want to wrap the flat tops? Won't your hands be there from time to time?
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Old 03-05-18, 11:33 AM
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Don't drill any holes!
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Old 03-05-18, 02:03 PM
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Originally Posted by Marcus_Ti View Post
I'd external route the shift cable
That'd be what I'd do.

I run my cables (aluminum bars) on the front and back of the bars where I think they actually improve the grip comfort on the tops of the bars. Round, or Aero bars.
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Old 03-05-18, 03:11 PM
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I would not have bought carbon bars from China, myself,

But, maybe OCD and it's fine, IDK, belt and braces.. DIY Add more Material.. reinforcing sleeves?

Do surface prep, then lay up some more carbon fiber.. around the hole.. catalyzed resin and cloth wet wrap,,

press out air bubbles with your hands in disposable gloves...

extra layer will bulge up a bit, but maybe the bar tape over it will hide it.



like patching a fiberglass boat , but the cloth is carbon, not glass , and resin Epoxy, not polyester..




...

Last edited by fietsbob; 03-05-18 at 03:20 PM.
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Old 03-05-18, 05:04 PM
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Originally Posted by SquidPuppet View Post
Run on exterior.

Why don't you want to wrap the flat tops? Won't your hands be there from time to time?

Flat tops are designed to be naked.

Some wrap them but they are supposed to be aero.


-Tim-
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Old 03-05-18, 05:39 PM
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Originally Posted by TimothyH View Post
Flat tops are designed to be naked.

Some wrap them but they are supposed to be aero.


-Tim-
I thought the flat tops were for improved hand comfort too.
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Old 03-05-18, 10:41 PM
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Originally Posted by fietsbob View Post
I would not have bought carbon bars from China, myself,

But, maybe OCD and it's fine, IDK, belt and braces.. DIY Add more Material.. reinforcing sleeves?

Do surface prep, then lay up some more carbon fiber.. around the hole.. catalyzed resin and cloth wet wrap,,

press out air bubbles with your hands in disposable gloves...

extra layer will bulge up a bit, but maybe the bar tape over it will hide it.



like patching a fiberglass boat , but the cloth is carbon, not glass , and resin Epoxy, not polyester..




...
This is my second set of direct from China bars. The first set I never even mounted they were so flexy and that flex was a accompanied with some crackly noise. I paid more for these and these do feel rigid. I'm looking at adding a side port for the entry of the shift cables. I'm expecting a call back from an epoxy supplier tomorrow through my position at work. It's been suggested that I might be able to grind a hole that I need the epoxy an insert back to sort of support the hole and the epoxy would stop any cracks resonating from any hairline fractures.
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