>>1015339No offense, but are you sure you have a freewheel and not a freehub?
If a freewheel behaved that way, I would be surprised, but the cause would be straightforward (not enough good lubricant on the bearings inside the freewheel).
But I have seen this happen with freehub wheels a few times - the issue is that the cone and locknut aren't properly adjusted against each other, so the cone comes loose and threads itself into the hub, thus binding the freehub body.
>>1015243Thanks, but I still don't get it - I understand how the teeth could offer extra security keeping a tabbed washer in place (though this hardly seems necessary), but without a tab, what's the advantage of keeping the washer (which is nothing more than a spacer to increase the stack height of the headset?) trapped in placed relative to the race? Why bother cutting those teeth at all?