Alright. So I'm froob and must admit I don't quite understand the bicycle and how it seems to give you more for less, so to say. I figured the shape of a wheel and how the curves stand off from the ground sorta enable gravity to give an extra pull on it. How ever , when I went to look it up it said the wheels acts like a lever. Hmm, So how does a lever work? Couldn't find a very exact reason for that. Somehow the lever and the wheel-lever definitions need to match... Thanks!