> OK Ron, I'll bite. Then what holds them on them? The usual hubcaps (not
> wheel covers) are mounted just outside the lug nuts.

This is what results from writing an email late in the day when the brain is
not functioning. :-)
Yes, the hubcap covers the lug nuts.  It just does not extended to the edge
of the wheel like the plastic wheel covers do.

- Ron Salmon
  The Bus Depot, Inc.
  http://www.busdepot.com
  (215) 234-VWVW