People here bike commute in any weather, which is cool. But I see a lot of people riding in icy conditions with no studs and no helmet. Seems very risky to me. For example, last night we got a bit of ice/sleet and then an inch or so of snow. And it's cold this morning so it's all pretty frozen up. The roads are covered in ice--some of it slick, some of it crunchy. While walking the dogs I saw several people go by on mountain bikes. They had knobbies, but not studs (I'm pretty sure of that) and no helmet on. Made me cringe as I watched them nervously navigate the ice.