I've posted this before. . .but I'm not exactly tall (5'8") but I ride a bike that is the same size as a lot of people who are 6' plus. The reason for this is that I have monkey like (I can touch my knees while standing up straight, try it I'll bet you can't) arms and even though my seat is nearly all the way down in the seat post, my arms feel if not perfect a little cramped. Maybe a lot of people who ride track bikes have really short arms or legs!