I have been thinking about buying a road bike and know NOTHING about them. I have looked at some new but would like to get a good used one. Anyone have an extra they can live without? I am not sure on size but a L or XL mtb fits me fine. 56cm or 58cm maybe???? I mainly want it for the set of rollers I got so a Fixie may work. Even with my semi-road tires on the 29er it is load as hell.....