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PostPosted: Thu Jan 14, 2016 5:26 pm 
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Joined: Tue Sep 15, 2015 8:27 am
Posts: 35
Location: Bristol,UK
Hi all,
Just wanted to pick brains for what's the best way to route cables.
I'm cleaning up an old Wilier frame and was looking at perhaps changing the current external alloy hangers for carbon versions (save those few grams!)
But then I was thinking of maybe changing it to internal.
Do most internally routed frames split the outer at cable in and cable out? Or do they just run the outer all the way through?
I can see splitting the outer would be lighter but I'm guessing it's more important to get clean cable splits.
What do you think would be best?
thanks

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PostPosted: Thu Jan 14, 2016 6:33 pm 
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Joined: Fri Aug 28, 2015 2:03 am
Posts: 172
cables are split, hydraulic and eletronic wires does not split


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PostPosted: Thu Jan 14, 2016 6:39 pm 
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Joined: Tue Jan 28, 2014 6:52 pm
Posts: 527
On my C59, the outer rear brake cable goes all the way through the frame. There is also a small tube running through the frame so you just slide it through without any routing headaches.

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PostPosted: Thu Jan 14, 2016 10:08 pm 
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Joined: Wed Jan 22, 2014 11:48 am
Posts: 1352
That makes it heavier AND more cumbersome than internal...


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PostPosted: Thu Jan 14, 2016 11:03 pm 
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Joined: Tue Jan 28, 2014 6:52 pm
Posts: 527
I'm sure it's heavier but it was the easiest install of any bike I've ever put together.

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PostPosted: Fri Jan 15, 2016 3:14 am 
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Joined: Mon Aug 17, 2015 4:03 pm
Posts: 233
Location: Chicago, IL, USA
How do you change a frame made for external routing into internal routing? Drilling?

I was in an internal routing craze few years ago, not any more. Unless the entry and exit angles are well designed (very few frames are) then it creates a lot of cable friction, not worth it in my opinion.

Di2 and hydraulic are totally different story though.

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PostPosted: Fri Jan 15, 2016 4:18 am 
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Joined: Mon Dec 22, 2014 1:27 am
Posts: 78
Full length cable housings are heavier and not as stiff as a split cable with cable stops.


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PostPosted: Fri Jan 15, 2016 12:17 pm 
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Joined: Tue Sep 15, 2015 8:27 am
Posts: 35
Location: Bristol,UK
Birdman wrote:
How do you change a frame made for external routing into internal routing? Drilling?

I was in an internal routing craze few years ago, not any more. Unless the entry and exit angles are well designed (very few frames are) then it creates a lot of cable friction, not worth it in my opinion.

Di2 and hydraulic are totally different story though.


It would involve drilling a hole. I was thinking of designing a 'port' and 3D printing it but I'm not entirely sure a 3D printed plastic part will be tough enough unless over-engineered which kind of negates the weight saving. I also knew that cable line would be key to avoid the inevitable roughness.

I've designed a simple new hanger which I'm planning to make out of carbon and bond to the frame - hopefully it should be strong enough and save a little weight compared to the current riveted alloy hanger.

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