Okay, I've already got three other bikes, why do I need a fixed gear? Because I'm gluttonous and want to try one out. I"ve got a roadie, a mountain bike, and a commuter. (all which get plenty of use in denver) My question to those with fixed experience is: Mountain bike with slicks or road bike? Especially if I want to use it in Denver AND Denver can be pretty hilly with my destinations what is a good gear ratio to use?

Thanks mucho,

Dave