[vujade]

16 x 7 phone dials have a 52.3 mm offset on the 7" wide rim so I have
no idea why you would be rubbing with a 3/8" wide spacer.

I have a similar setup running maxx struts with 17 x 7 with 55mm offset
porsche wheels I had no rubbing on the strut whatsoever. In fact there
was about an 1/8" of clearance between the wheel and the strut. I was
using a 3/8" spacer as well.

You should have an extra 3mm of clearance between the strut and the
wheel then I did seeing as your offset is 52 and mine was 55.

It has nothing to do with the tire whatsoever.
I running the same width tire.

Are you sure it is a 3/8" spacer?
Maybe you spring isnt sitting in the strut tower properly and its not
lined up like it should be...