I still have the 16 tooth on the otherside of the hub, so I might switch it up every once in a while. Luckily for me, Minneapolis is pretty flat, so I don't have to strain up too many hills, otherwise I wouldn't have chosen such a ratio. I remember when I built my first fixed gear bike, a 70's gitane I had a 52-15 ratio, which lasted just a few weeks.

How do you figure out "gear inches" anyway?