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Old 02-24-19 | 06:35 PM
  #16  
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rm -rf
don't try this at home.
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Joined: Jan 2006
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From: N. KY
Originally Posted by Le Mechanic
I like to use a long teflon routing tube, slipped over the inner cable before pulling it out of the frame. That allows you to simply route the new cable through the tube to the exit point. I suspect you've already pulled the old cable out and are trying to fish th new cable through. Would removing the bottom bracket give you more access to the problem area? I made a video a while back with some tips and common issue resolutions that may be helpful.

https://www.youtube.com/watch?v=YTVQ0f9ydxg&t=1s
Yes.
See my previous post about internal cables.

Don't pull out the old wire yet!
It's way easier to push thin liner tubing onto the existing wire from the rear of the bike. Push it toward the front of the bike until the tubing comes out the wire hole in the front. Hold the tubing in place and pull the wire out. Now there's a hollow tube sticking out both ends of the bike. Feed the new wire through the tubing. This is easy and an elegant solution.

Your photo shows a hole that appears to be large enough for tubing.

from my post, the tubing looks like this:



~~~~~~~~

Originally Posted by Nessism
Before you remove the old cable casing you can stick a stiff wire inside both the old and new casing and then use the old casing to guide the new through the frame.
I think most frames don't have housing inside the frame. Perhaps this was more common in the past, with continuous housing from the shifter or brake lever all the way to the back of the bike?

I expected my internal rear brake cable to have some kind of internal guide tube. So I just pulled it out to replace it. Oops. No internal guide, just a hollow frame with sockets for the outside housing and a tiny hole in the socket to fit the wire. Now what! The LBS mechanic fished the tubing from the back toward the headset with the fork off the bike, then could see and guide the tubing out the front hole with fingers.

It's way easier to push the tubing on before pulling the cable!


Originally Posted by 02Giant
Add patience to the suggestions already made. It can be a pita, sometimes.
I never would have thought about using thin tubing. It's interesting how a project that seems difficult and annoying is actually quite simple with the right tools. I really needed someone to show the new tubing method, though.

Last edited by rm -rf; 02-24-19 at 06:56 PM.
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