The splines of that pulley don't look as square as a standard toothed cog (or the ones I use anyway) which may not have helped and maybe less suited to using fixed?
@kerley started
London Fixed Gear and Single-Speed is a community of fixed gear and single-speed cyclists.
@kerley
The splines of that pulley don't look as square as a standard toothed cog (or the ones I use anyway) which may not have helped and maybe less suited to using fixed?