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.