You need one of these, a thread file (with the internal thread bits at the end), and a vice to hold the cog. Could help, but I'm the wrong part of town.
@36x18 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.
You need one of these, a thread file (with the internal thread bits at the end), and a vice to hold the cog.
Could help, but I'm the wrong part of town.