Are expensive cables/cable housings worth upgrading to on an entry-level bike?
My Giant road bike with a Claris came with pretty basic Jagwire stuff. I noticed that even when properly adjusted, the front derailleur is pretty hard to shift (turns out my shifter housing at the ferrule end has started fraying). There's also some noticeable friction on the rear brake (noticeably not as smooth as the front one). I've already decided not to spend money on things that won't give a noticeable performance improvement. So far, I've only planned on replacing the saddle, the tires when they wear out, and maybe even the wheels in the future. Should quality cables/ cable housings be added to the list? Or are inexpensive cables and/or cable housings good enough for a low-end bike like this? If I do upgrade, I found a complete kit of Jagwire Pros for 40 USD. Are they worth it?