I can add to the riding in the snow on the streets is sketchy. I went out last winter when we had that one big snow storm with my knobbies and had to basically keep one foot dragging the ground at all times. It does get easier and smoother the faster you go though.
[video=youtube;txX0TjSmDTY]https://www.youtube.com/watch?v=txX0TjSmDTY[/video]