Yeah Ron, from what I can tell after researching more is that Vintage is using the method of going from the lip to the pad. That measurement is spot on the 5 5/8" we spec'd out.
The flaw in the logic was with using the Weld wheel with 5" backspace as a point of reference. That wheel measures more like 5.5" using the lip to pad measurement. Funny since Weld doesn't even sell a 5.5" backspace 15" X 10" Alumastar 2.0 wheel. Clearly this is the problem.
I'll talk to Vintage tomorrow and see what the options are.
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John
'71 Nova ( Build thread)
FFR Roadster
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