Originally Posted by
yellowcanoe1
Another "why didn't I think of that!!!" idea from Henke on the Classic & Vintage board:
"I have a bike with internal routing. When the time comes to change cables, I just remove the seat with post and use my index finger to point the new cable up the hole from inside the toptube. I have never had a problem with this method. Guess you need quite long and slim fingers, though."
http://www.bikeforums.net/showthread.php?t=360517
Unless it is like my Pinarello and the top tube only has a 3/8" hole in each end.
Have to take some thin wire and bend it until I find the hole on the other end.
That's why I slide some cable liner tube over the cable untill it is out of both holes and pull old cable out.
Slide new cable in and remove liner. Done. Been doing this for 20 years with this bike. It works.