Probably an obvious answer to this question but....how do you guide brake cables/casing through top tubes that have holes for internal cabling?
If the cable outer is not still in there, I believe it's a nightmare. Think you have to use a magnet and have lots of patience to drag it along to the right position.
If the cable outer is not still in there, I believe it's a nightmare. Think you have to use a magnet and have lots of patience to drag it along to the right position.