I'm just working on my old bike, to elevate it from junk to beater/commuter status.
It's got non-aero brake levers, and downtube shifters.
How do I know whether I need to replace brake cables or shifter cables? They seem to be doing the trick fine at the moment, but they are darkened and have been on for quite a while (I've had the bike for twelve years without changing them ).
Any symptoms the show that they are too far gone? The bike is a 1980, and I have no idea when/if they were last changed, though the shop I bought it from might have replaced them before I picked it up.