I'm looking for a set of Mag wheels for my 72 Std Bug. What is the
> correct measurements for a 4 bolt pattern? or what sizes I could get
> by with. I really don't want to use wheel adapters.
The wheels you want are 4 on 130mm (5.118") Choose wisely. Ask around.
Just in case you want to know how they are measured, see:
formatting link
the section on Bolt Circle measuring.