Even though the pros can and do ride lower, it clear to me that their frames have to be smaller than what would be standard because if you just look at the geometry of some of their bikes, if they did fit even close (stand over height) their legs would have to be abnormally long. Whenever I've seen a bike setup with the seat 6" higher or more than the bars, either the person does have extrremely long legs or they've chosen the smaller, lighter frame size.