I took a day off commuting today since I was a bit tired and the night time temp dropped very significantly. I got home early today and just to see how it is like really riding in snow. In NYC, we have 2 feet of snow and most streets aren't plowed. I found out several things. My Ritchey Speed Max (only big knobs on the side and the center with fine treads) does not give me any traction at all. I managed to ride couple of feet on the sidewalk which was plowed and I was sliding everywhere. Second thing was that I can't use clipless pedals, at least with my SPD-SL, because the cleats cloated with snow.
Would a wider knobby tires work better in the snow? I do have my stock Specialized DH Enduro tires but they about 2 lb each.