I disagree. I have one bike, a hybrid, that I use for everything, commuting, utility, and light trails. Unless you count my unicycle...

I have a second bike, but it's basically my roomate's - I just haven't gotten around to technically selling it to him yet.


@ the OP

If you want an efficient bicycle built for utility, go with gears. I feel that gears make it a lot easier to haul heavy loads, be they on your back, rack, or trailer.

If you want simplicity, get a unicycle.

Fixed gear bicycles: the worst of both worlds. Unicycle + complexity, bicycle + inefficiency.