First of all, I must confess to having a herd of bikes. Different bikes for different kinds of riding. I have two single speed bikes. 1) Surly Steamroller - fixed. Just to experience the experience. Tough but fun. 2) Kona Unit. This is a single speed mountain bike that I use in the winter. Eliminates any worry about cables, derailleurs, etc. And, no need to worry about what gear I'm in. Love it. However, I love my touring bike, road bike and cruiser as well.