Originally Posted by
AndjaVXC
I should also add that I have never had internal routing before. There's a screw hole on the underside of the shell for a cable guide, but it did not include one.
The inlets on the frame near the top tube don't have stops for the housing, and the underside where the cables exit is just an open port on the downtube. Hence, full-length housing.
Underside of the frame is similar to this:
...with internal routing for your cables, the housing stops are usually accomplished with some kind of cable end, that stops the housing right at the hole.
Like this, more or less:
...it's not at all unusual for the rear derailleur cable to exit from the rear of the chain stay, in which case the only housing you need is a small piece from there to the derailleur. But there are many variations on this theme.