Building my first bike this winter, have a question about cabling, just cannot seem to find much info on the net or any of the obvious books (parktool or zinn) on this. The frame has internal routing so that makes it easy to push the cables all the way through. Question is what, if any, do I need to put into the internal routing. If I just put the bare cable in, it seems to me that this is carbon on cable (in particular were the routing passes the crank so RD and FD) which does not seem to make much sense. Any thoughts on this would be much appreciated.
Some frames have stops built into them that won’t allow you to run a cable housing into the tubes, other frames are designed to have the entire cable plus housing run all the way through. Generally when you run bare cabling internally and pull it to final tension, it won’t be rubbing inside the frame. In the case of the derailleurs, you will have a plastic plate under the bottom bracket area that receives the bare cable and becomes the contact point where the cable rubs during shifting, so no real rubbing inside of the frame in the case of a bare cable.
