Yeah exactly there’s an issue with the old spesh mindset headsets so I’m changing it with a new cane creek forty series headset but other users report having issues with a loose top cap, all reportedly solved by a few shims placed here.
Am asking as 4mm seem the size of a spacer not a shim.
Looking at the shims I have none of them are marked with a thickness. Looking on the condor website I can find the shims I bought from there to show that.
Two different diagrams nicked if the wiki page, which bit are you wanting to put the shim in.
Is the compression ring there?