I had a heck of a time trying to clean my extremely dirty, spotted, "tarnished" wheels on my bike. have a 01 e/g with the standard aluminum wheels and previous owner did not keep them clean. someone said simple green would clean them, but it did not. last night i tried "colonel brassy" i got from an HD dealership on a small spot on the back wheel, and it did in fact clean the wheel, and with less effort than i thought. i have purchased 1500 grit wet sandpaper and fine steel wool, and plan to get the aluminum close as possible back to new. that way my new white walls will look better when i get them put on.