I mostly ride road bikes, some mtn biking. I got my first fixed gear a month ago, and I find myself commuting on the fixie, and riding it around town. I love the thing. It's been a challenge. It's different. I do have a front brake on it. For the riding I do on that, I've no need to ride 18-20 on it.. I leave any fast rides for the road rides. My fixie is more for fun than anything... it just happens to get me to work, too.