Bent and replaced many of them in competition Alex.

They just knock out.

Hit the rim and induce positive camber on the wheel and when in service we just used to whack them out spin them round 90 and hey presto instant negative again

Cue Bondy1 to tell the story of my stub snapping and my wheel coming off on the M6 and me carrying on off the motorway down the slip road and round the roundabout and into the service station until they could get me a spare with only 3 wheels on