Internal cabling guide straws.

[sackville d]

OK,first question.The guide straws for rear mech,front mech and rear brake are only guides and are to be removed once the cables are fed through,Yes or no? Thanks in advance for any help given folks The frame is a PX RT58 carbon (not alloy)

 

[ColinJ]

I don't know, but surely the answer is 'no'? If you remove them, then how would you feed the next replacement cable through?

 

[sackville d]

I don't know, but surely the answer is 'no'? If you remove them, then how would you feed the next replacement cable through?

Hi Colin,I would (did) think by sliding the straw back over the cable starting at exit hole on the chain stay until it came out at the exit hole near the head tube,removing the old cable,sliding the new cable back through the straw and finally removing the straw once again.

 

[ColinJ]

Hi Colin,I would (did) think by sliding the straw back over the cable starting at exit hole on the chain stay until it came out at the exit hole near the head tube,removing the old cable,sliding the new cable back through the straw and finally removing the straw once again.

TBH - none of my bikes have internal cabling. I just assumed that the guides would be left in place, but perhaps your idea would work. Is there a problem with just leaving the guides there?

I just found this article, which might help!

 

[GrasB]

What type of internally routed cable channel it is - lose inner, guided inner, lose outer or guided outer? As a general rule you leave the routing straw in for lose inner, but for all others you remove the straw.

 

[tincaman]

For my bike I have full outer to the rear disc brake and loose inners for the gearing, all the liners were removed and kept handy for when they get fed back in again at cable replacement time. I don't see the point or advantage of leaving them in.

 

[sackville d]

TBH - none of my bikes have internal cabling. I just assumed that the guides would be left in place, but perhaps your idea would work. Is there a problem with just leaving the guides there?

I just found this article, which might help!

Hi Colin,time to fess up.The bike was built last July by me.The cables were fed through the straws and the sraws were pulled through and out of the frame
Jump forward to now and after the bike been sat around inactive for a while find that rear shifting is almost seized up so deside to rerun the cable and give a clean. Bear in mind this is a super clean bike so why the shifting went west is a mystery to me
Anyhoo,took the cable off the rear mech and tried to pass the straw over the cable at the chain stay aperture only to find that the straw will only go about 7" along the cable then jam. No way would it go up to the downtube cable stop.
I then made the monumentaly stupid decision to pull the cables out hoping that there was proper internal guiding installed.
I mean,who would use 5p woth of plastic straw in such an integrally important area as gear cables on a carbon fibre bike
How wrong I was and now have a bike with neither cables nor cable guides.A very bad day.

With regards the idea of leaving the straws in,surely they would need to be the precise length between the cable stops on the downtube and the chainstay, (which they are not) otherwise the cable ferulles would not sit square in the cable stops

Hope this makes sense Colin.I`m a bit p***ed off cos I feel I`ve screwed up one of my prime bikes.Not good.

Ps Colin thanks for the link,seen it before but I think my routing is a bit more internal than that.Ta mate.
Pps Good job I`m totally in love with the Basso (always was) after a big re-fit.

 

[sackville d]

What type of internally routed cable channel it is - lose inner, guided inner, lose outer or guided outer? As a general rule you leave the routing straw in for lose inner, but for all others you remove the straw.

Hi GrasB,wheather it`s loose inner or guided inner I`m not sure but when I built the bike up leaving them in never even entered my head

 

[sackville d]

For my bike I have full outer to the rear disc brake and loose inners for the gearing, all the liners were removed and kept handy for when they get fed back in again at cable replacement time. I don't see the point or advantage of leaving them in.

Just What I would have thought Tincaman but feeding the straws over the rear and front gear cables has proved impossible

 

[ColinJ]

Ouch! There must be a way of doing it (the manufacturers manage it!), but I bet it is fiddly ...

Good job I`m totally in love with the Basso (always was) after a big re-fit.

I have been fettling my Basso today. The front gear cable had frayed and needed replacing so I thought while I was doing that I would try and find out why I always seem to struggle to get the chain up onto the big ring. After messing about with the endstops and the mech. positioning, I have come to the conclusion that the bottom bracket is too long! I can't get the derailleur cage far enough out to clear the big ring properly. Oh well, I'm not buying a shorter BB until the current one wears out. I will just spend even less time than usual on the big ring/small sprocket combination!

 

[GrasB]

Hi GrasB,wheather it`s loose inner or guided inner I`m not sure but when I built the bike up leaving them in never even entered my head

From your post above it's a loose inner. I HATE that type of internal routing. When you don't leave the sleeve in there it tends to catch on bits inside the bike & cause the cable to jam causing problems like you described

The way to deal with it is to cut the straw slightly long then flair it out so that it sits in the mouth of the ferrule stop. the ferrule then holds the straw in place for use & it sits flush in the frame.

EDIT: If you're saving up for something starting this job is a good time to get the swear tin out.. it WILL be overflowing when you've finished.

 

[J4MIE_P]

Only a quick reply.

Get some cotton, put it in one end and get the hoover over the other end and viola.

Then tape the cable to the cotton and pull back through.

Works eveytime for me and makes a full day job take no more than 30 mins

 

[sackville d]

Only a quick reply.

Get some cotton, put it in one end and get the hoover over the other end and viola.

Then tape the cable to the cotton and pull back through.

Works eveytime for me and makes a full day job take no more than 30 mins

Thanks Jamie,I`m going to have to give it a go.

 

[ColinJ]

Only a quick reply.

Get some cotton, put it in one end and get the hoover over the other end and viola.

Then tape the cable to the cotton and pull back through.

Works eveytime for me and makes a full day job take no more than 30 mins

That's a clever idea - I like that!

 

[raleighnut]

TBH - none of my bikes have internal cabling. I just assumed that the guides would be left in place, but perhaps your idea would work. Is there a problem with just leaving the guides there?

I just found this article, which might help!

A guy at my LBS told me of this trick nice to see it in print.