Don't think the lockrings are for 12mm axle.
There fitted and there fine. Larger gap around the axle perhaps but I don’t think that’s a problem.
In other news, sod those ugly post to flat mounts, gone and bought some proper flat mount brakes.
@HousecatHST 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.
Don't think the lockrings are for 12mm axle.