Geno's offers a product called "Kleen Wheels", made of aluminum alloy that fits in between hub an wheel, like a hub cap on the inside, that is suppose to do away with the brake dust problem. I have not tried it, just read about it in the Geno's catalog. I have also seen a product at Wally World made especially for cleaning brake dust off wheels,comes in a spray bottle. I can't remember what it's called though.