Advice on how to replace an internally routed gear cable

[Mountgrove]

Hi I have a Whyte cambridge 2018. Picture here https://www.leisurelakesbikes.com/14418 ... yblue.aspx
I have removed the gear (inner cable). I hope this can be replaced !
I was thinking along the lines of threading the new inner cable down the tube and if necessary use a magnet to get it all the way to the bottom bracket and along the chainstay so it comes out the other end at the rear derailleur.
If this fails is there any other hack I can use ?

If you tell me that I should not have removed the inner cable before inserting the new cable - does that mean I cannot use the internal route at all ?

All advice gratefully received !

[Jdsk]

"Tricks for Internal Cable Replacement":
https://www.roadbikerider.com/tricks-fo ... placement/

including one in the Comments that I hadn't heard before.

Jonathan

[NATURAL ANKLING]

Hi,
What do you intend to do with the outer cable that runs through the frame?
Is there an Outer Cable?
Looks like there is...

I would replace the whole cable.

[Mountgrove]

If necessary I will change the outer casing as well. I guess this will mean the same amount of work ?
I saw someone do this with a vacuum and something on the end of the gear inner cable. So then once the inner cable is threaded through the downtube you can pull /push the outer housing over the gear cable .

[Jdsk]

I saw someone do this with a vacuum and something on the end of the gear inner cable.

That method is described in the Comments of the article cited upthread.

Jonathan

[Mountgrove]

Thanks both.

[simonineaston]

I think the cure for the problem is liely to be frustrating and time-consuming. But it can be done! I threaded cable outers into and out again (obs) of a vintage Moulton F frame some while ago.

[mattsccm]

Vacuum and a bit of string works as does a magnet. Ideally before you pulled it out your would slide a bit of thing stiff pipe along the czable inside the frame. Too late for that but the pipe may be stiff enough to thread through the frame. Mine is. Gott it from ebay. Soemthing to do with fish tanks I think.