Yeah, what the others are saying :xyxthumbs I just used two of them to do the back sides of some wheels that had NEVER been cleaned. They wore out pretty fast, and they were pretty aggressive. I sure wouldn't use them on MY wheels if I could help it. They don't reach inside too well when the wheels are mounted on a vehicle, either. I only use them for the backs of DISmounted wheels.
For cleaning the backs when the wheels are mounted, I use the "heavy duty" swabs available from Griot's and others. You can't let things get too grungy between cleanings, though.
Anthony- Just how gentle is that brush you linked to? It looks good, but I'm VERY careful about what touches my better wheels. Would you, for example, use it on the hood of a car? Silly analogy/example, but you see what I mean...