Originally Posted by
justridingalong
I'm replacing a rear shifter so a new cable is required. I've seen videos that use tubing with a i.d. that slightly larger than the cable as a guide, magnets, thread fastened to cable, a vacuum. I think I'm going to remove the bottom bracket and have a look into the shell, then make my decision. Right now I'm considering fishing line connected to the end of the cable for removal and installing a new cable. I'll post my results in case I can help others. Unless there's something wrong with a barrel adj. I'd leave it. Replacing housing is recommended. I'll check that Amazon liner out.
Just FYI, I used that liner cable from Amazon, worked absolutely perfectly!
The inner diameter is just ever so slightly larger than the shifter or brake cable. You just slide it over the old cable, through the frame. Then, slide out the old cable, and slide in the new cable. Very easy, and no risk of the cable getting lost at any point.
I would definitely use this method again in the future, and not bother with any other method.