I have used Klasse on my wheels a few times. It does help to keep them a bit cleaner when using plain car wash. If you have a wheel that doesn't get too dirty or full of brake dust, its worth Klassing them. If you have a wheel like the BMW which has oversize brake pads and large openings for the dust to accumulate fast and embed into the clear coat, then I think that Klasse is pretty much a waste of time. I have to use EF HI just to get it clean most of the time, and even stronger stuff ie Armour All Wheel Cleaner with a brush on occasion. This definitely removes the Klasse. So unless your wheels stay pretty clean or you plan to Klasse every week, fuhgedaboudit......
H