a few days ago, you asked why cupping occurs and a bunch of people told you the several reasons - all of them were right. today, you ask such a fucking retarded question? are you a fucking moron? don't you have any fucking common sense of your own to figure any thing out? if you don't get it, why don't you put down your beer for a second and just think about it. you just might realize that not only do your front wheels have a suspension system, but so do the rear wheels.