changing gear cables that run inside the frame.

[Banjo]

I have an ally synapse and want to change the cables.

Any tips on threading them through the frame?

 

[Pikey]

On my synapse I ended up taping up the other holes in the frame apart from the two needed for the particular cable, then sucking at one of the holes with a hoover, feeding cotton through the other until it came out where the hoover nozzle was, then tying the cable to the cotton and using this to pull it through.

 

[T4tomo]

That's not a bad idea, I've heard of magnets also been used. There must be. You tube clip or two.

If the old one is still in place, then tie a long enough piece of thread to it as you remove it, and then tie the thread to the new cable and pull it back through.

 

[I like Skol]

On my synapse I ended up taping up the other holes in the frame apart from the two needed for the particular cable, then sucking at one of the holes with a hoover, feeding cotton through the other until it came out where the hoover nozzle was, then tying the cable to the cotton and using this to pull it through.

This is how I recently did mine after I foolishly assumed there would be some kind of internal guide when I pulled out the old cable

 

[Arsen Gere]

If you get completely stuck... Take the bars off, drop the front forks out and feed the cable in from the back. You should be able to see the cable in the frame and then route it through where ever it goes. Not the easiest way but some frames are a real pig if the cable outer goes all the way through too.

 

[Big Dave laaa]

That's not a bad idea, I've heard of magnets also been used. There must be. You tube clip or two.

If the old one is still in place, then tie a long enough piece of thread to it as you remove it, and then tie the thread to the new cable and pull it back through.

^^ this but I use a decent strength nylon fishing line. It slides easily and a bit stronger than thread. If you've already taken the old one out prepare to have your patience tested

 

[jowwy]

feed a length of outer cable into the frame ( make sure its no longer on both sides) feed the inner cable through it and then pull through the outer from the frame and viola........

 

[oldroadman]

I watched a team mechanic do this. First cut old inner cable end off, so there's plenty sticking out of the outer cable ends. Slide outer away leaving old inner in place. Feed new outer into place, secure, slide old inner away, slide new inner in place. Done. At least that's what I think he did! Looked nice and easy.
Internal routed cables are a right pain!

 

[Racing roadkill]

I watched a team mechanic do this. First cut old inner cable end off, so there's plenty sticking out of the outer cable ends. Slide outer away leaving old inner in place. Feed new outer into place, secure, slide old inner away, slide new inner in place. Done. At least that's what I think he did! Looked nice and easy.
Internal routed cables are a right pain!

This is the answer.

Another slight variation is to clamp the new cable inner to the old inner cable, with a crush connector ( the sort you use in an audio visual installation ) pull the new inner through ( don't forget to lube it up) you can also solder the cables together, or braze them together, when the new inner cable is through, cut off the old inner, then remove the old outer, and slide the new outers on.

 

[mickle]

This is the answer.

Yes it is.

 

[Cubist]

This only works if the internally routed cable has outer cable along its length inside the frame. Many don't. I use the inner lining of an old piece of cable outer with the wire reinforcing and outer plastic cover stripped off to feed up the inner before removing it. Tape the sleeve in place and feed the new inner down through it. On some frames I have successfully used a length of hydraulic brake hose as a similar guide. Some better frames have removable end stops where the cable enters the frame, and you can simply feed the inner into the frame and hook it out with a seal pick/hook.

 

[r04DiE]

I watched a team mechanic do this. First cut old inner cable end off, so there's plenty sticking out of the outer cable ends. Slide outer away leaving old inner in place. Feed new outer into place, secure, slide old inner away, slide new inner in place. Done. At least that's what I think he did! Looked nice and easy.
Internal routed cables are a right pain!

Yep, that's got to be the way.

 

[wam68]

Found this video very good

View: https://www.youtube.com/watch?v=eI_Hlw3RWf0

 

[Banjo]

Found this video very good

View: https://www.youtube.com/watch?v=eI_Hlw3RWf0

Excellent. cheers.

 

[Flying Dodo]

I think I'll stick with external cables for as long as I can.