I've used those polymer coated cables and when I came to replace the inners, the outers were full of polymer fluff blocking the passage, then I replaced them with Jagwire.
@Dogs started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
I've used those polymer coated cables and when I came to replace the inners, the outers were full of polymer fluff blocking the passage, then I replaced them with Jagwire.