I don't really need different bikes for different kinds of riding. My one bike does most everything I would use it for. HOWEVER....I have had two occasions so far when my bike was "in the shop" and I just about went out of my mind not having a bike to ride! For that reason I am planning to get a second bike- to keep me sane when one bike needs to be in for repairs etc. Also for if one bike gets stolen some day (God forbid!).