[Spridgets] Brake disk wobble

[Michael Rowe]

I have developed a wobble in one of my brake disks.  It is free, then binds, then is free as I turn it by hand and there is quit a bit of squeaking and shaking on the road.  This developed suddenly this morning, not slowly, and it is not clear to me from looking at the diagram what could cause a wobble if all is tight.  Is this a bad bearing?

What advice?

Michael Rowe
'74 Bugeyed Midget