Internally routing cables
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It's a chain slap protector. It was pretty common on French randonneuring bikes. You can buy them from Compass.
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I spent quite a while admiring the clever features and top craftmanship on that frame but the chainstay protector looked out of place and a bit naff. Looks like something a barber would have on the wall for stropping his razors :-)
#28
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Inside
The orange bike has a brass tube silver brazed in side for full outer brake cable housing no rattle at all . Check out M.A. P. Bicycles you’ll like it.
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I see that the orange bike took enough care to supply a spare tube so that after the top one cracks you can use the spare . Andy
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AndrewRStewart
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#31
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So where on the top tube is the proper area to place the holes for the routing? Closer to the joints are farther away? I would put the entry on the "lower left 45" on the front, and then more in the "upper center-leftish" on the rear; if that makes sense. But how far away from the joints themselves? 2", 4", 6?
Trying to learn. Thanks in advance.
Brandon
Trying to learn. Thanks in advance.
Brandon
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Since there's some greater possibility for the tube to suffer a crack at the cable port I suggest it's placed in the thick walled section. Perhaps the butt lengths should be figured out WRT to the ports. Andy.
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There is a series of photos in this Flickr album, showing how I did the internal brake routing on one of my frames. https://www.flickr.com/photos/starrc...57641510596513
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I had it in the back of my mind that 1/4" .028 tubing will work for this, but brake housing is 5mm and that means that .026-ish wall tubing is needed. I have seen reference to 7mm tubing, where can I get some of that?
On edit: I see there is 1/4" OD, .2" wall which should work. Wonder if I have any.
On edit: I see there is 1/4" OD, .2" wall which should work. Wonder if I have any.
Last edited by unterhausen; 10-26-18 at 06:11 AM.
#35
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I had it in the back of my mind that 1/4" .028 tubing will work for this, but brake housing is 5mm and that means that .026-ish wall tubing is needed. I have seen reference to 7mm tubing, where can I get some of that?
On edit: I see there is 1/4" OD, .2" wall which should work. Wonder if I have any.
On edit: I see there is 1/4" OD, .2" wall which should work. Wonder if I have any.
I use these guys for SS tubing for internal routing.
https://www.mcmaster.com/catalog/124/172
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yeah, I have almost $300 of small parts in my cart at mcmaster right now
That's where I saw you could get 1/4" OD, .020 wall tubing
That's where I saw you could get 1/4" OD, .020 wall tubing
#37
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There is a series of photos in this Flickr album, showing how I did the internal brake routing on one of my frames. https://www.flickr.com/photos/starrc...57641510596513
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I have a milling machine now, so I would use a 1/4" end mill to make a slot and then fine tune the fit with a file.
Its best to practice on a scrap piece of tube to figure out how wide and long to make the slot.
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doing it on a practice tube is a good idea. I have a pile of tubes I bought to practice with, have to do this on one of those
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Hello there,
Do you think it is doable to Stuff internal routing with a piece of metal and braze it then fill it to get back to a plain tube so you can put external routing ?
The internal routing is made by a tiny tube wich goes in the top tube.
Thank's
Do you think it is doable to Stuff internal routing with a piece of metal and braze it then fill it to get back to a plain tube so you can put external routing ?
The internal routing is made by a tiny tube wich goes in the top tube.
Thank's
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Sure, one can fill a accessible tube with all kinds of stuff. Calking comes to mind. If you ever wanted to go back to internal routing I suggest thinking about what you use as a plug/filler. Andy
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On the older (bonded) aluminum Trek road bikes, they would have a huge hole on the seat tube where the top tube joined, and you would insert a long foam tube into the top tube (after the brake cable was installed) to keep the brake cable housing from making noise.
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#45
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My frame used cable stops and a brass internal guide tube. If there is cable slap inside the tube, I sure cant hear it. Its all brazed together and quite solid. Making the entry and exit ports at an angle(other than at 12oclock. mine are about 7:30) will help reduce the chance of water penetration, as well as the fact that its just an overall snug fit.
Thank you! Do you happen to have a pic of the tubing you run in the top tube? Last night I ran my first brass tubing for the brake cable. It will be for the full housing. It came out really good actually and I thought it was easy. Just took some time to get it right. I can refine the process a bit more though. I was on the fence of running a housing stop set up, but thought I'd give that a go on the next one. I'll take some pictures when I get home today and put them up.
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Here are the pics. I got a little silver happy but overall, I'm very pleased.
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thanks for posting. I have to do that this week, it's bike building week. Now I'm thinking about retrofitting a frame with this first.
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I don't understand what you're getting at, can you elaborate why would want to remove it?