I have checked the forums and couldn't find an answer. I have been riding a 58cm road bike for everal years and want to buy a fixie to shoot around town etc. I want to buy through the nest and was wondering if there are any broad and basic size conversions between road and track. For instance is a 58 road frame equivalant to a 57 track etc? I know the geometry is different and there are a lot of other factors etc, but just generally