Friend at work has a PX RT58 road bike, he believed the gear cable snapped, which seemed unlikely, but daftly pulled the cable out of the internally routed frame. He has taken it two different bike shops and both have said after trying that they can't get new cable through without old being in place?
i believe being usual PX quality, the frame doesn't have internal guides. Is it a case of just trying to fish around until the new outer can be pulled through?
I don't have experience of PX bikes but on my Cannondale Synape (alloy frame) I've had to remove the crank in order to get access to the Bb shell to guide it through there.
Which part of the frame is causing you problems?
Hold a hoover against the port on the frame you want the cable to come out of, and feed a bit of cotton thread in the other.
In fairness to the shops, they probably just don't want a job that's going to take over an hour and likely result in an argument over how much replacing a gear cable should cost.
Thanks gents
You can guide the cable from insertion to its eventual exit from the frame with a couple of neodymium magnets if the hoover and thread trick doesn't work.
Worked with my PX N2a
Sounds like the internal metal tube/ guide around the bottom bracket has failed, it's a sod to sort out but it doable, I would give PX a ring and see if they can help
i believe being usual PX quality, the frame doesn't have internal guides.
IME it's the frames that do have internal guides that cause the most problems.
eTap
On my RT 58 carbon there is an alu tube with a plastic lining. Where it goes around the bb is quite a bend & the end of the new cable has a habit of piercing the plastic liner, rucking it up & blocking the tube.
I bought mine really cheaply because of that & fitted Di2 instead. I did try fitting a cable, just to see if it was possible & gave up after an hour.
You can pull out the old lining, drill out the stops were the cable goes into the frame and then run a full length outer cable from shifter to rear mech.
The proper park tool for internal cable routing is just metal wire and a magnet.
Old gear cable and a good magnet works well as it what I do at home