My co-workers call me nuts, but I've been riding a lot in the snow. The snowpacked streets have been especially nice since the weather's been cold & the ruts haven't really formed like they did following the pre-Christmas blizzard. It's not quite as much fun when the snow is deep, or when it's melting and slushy. I can't keep the momentum going in deep snow (8+ inches of fresh) and handling is a bit dodgy in the slush. I'm convinced that my fixed gear bike with cross tires is the SUV of bikes - I can accelerate like mad, but don't ask me to brake in any controlled fashion