My 35 mm Schwalbe studs were good in similar conditions as [MENTION=112025]wolfchild[/MENTION] mentioned, but same liability as well. I do have 45 mm Nokian's which I did not use on today's commute. Not sure if they would have been better. On one section this morning I had no choice but to walk the bike for about 200 m as both the road and sidewalk were unrideable having not been plowed from the ice pellets that fell yesterday and overnight. Lucky it was only 200 m, and lucky I had on SPD shoes with recessed cleats.