For those of you who might be thinking about purchasing Kleen Wheels, don't waste your time. I was getting tired of cleaning brake dust of my wife's 530xi wheels and my M3's wheels; so I decided to invest in the Kleen Wheels. Pulled a 530xi 5 spoke wheel off; cleaned it inside and out and proceeded to put a Kleen Wheel disc inside the wheel. So far so good, I thought. Turned the wheel around and what a disappointment. The "inside wheel cover" concept make the wheel look ugly and like it was a wheel with a crappy wheel cover instead of an alloy wheel. Needless to say Bavarian Auto will be geeting a return of merchandise on their satisfaction guaranteed pledge. I still have to box them up and ship them out - what a PITA. Again, Brother Beemers - keep cleaning the wheels and don't waste your efforts with the wheel discs (IMHO they are butt ugly).