In all seriousness though, what about one with an allen-headed bolt, then put a ball bearing in grease in the hole, and carry a magnet with your repair kit?
@Skülly 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.
In all seriousness though, what about one with an allen-headed bolt, then put a ball bearing in grease in the hole, and carry a magnet with your repair kit?