Probably 928 collapsible spare wheels, which are 15x7. I was thinking about doing that on my Boxster. Now that I see it, I still am.
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Connor: 1999 Boxster
Stitch: 1982 928
Finn: 2005 Cayenne "...the 928 is not a joy riding car; it's a tool, a road weapon designed to destroy distance and crush time."