fritz:
It's simpler than that.
A 7-fork design cannot be reconciled with a conventional 5-bolt wheel in terms of harmonious styling.
Fritz,
I have to disagree. I find the 7-fork styling on the 5-bolt Panamera RS-Spyder wheel quite attractive.
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Mike
2005 Carrera GT - Signal Yellow + 2008 Tesla Roadster - Thunder Gray +1972 BMW 3.0 CSi - Nachtblau +2009 Bentley Arnage T - Black Saphire