Welcome to my world, the RC is the most attention grabbing car I've ever driven! Constantly being 'shadowed' by Beemers and Mercs, never mind the Police!
Is it the design of the rim or, more likely, the type of tyre fitted? The Bridgestones that came on the RC from the factory have a very generous rim protector ridge, as did the Michelins on my CLS. I'm guessing the tyres aren't factory originals?