do you have a lockring on there? it has a reverse screw thread (i.e. you tighten it anti-clockwise).
should look something like this (the lockring is the black bit):
@mattty 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.
do you have a lockring on there? it has a reverse screw thread (i.e. you tighten it anti-clockwise).
should look something like this (the lockring is the black bit):