Yesterday's commute + bonus miles was on Nokian/Suomi Extremes, 26x2.1, 30/40 PSI front/rear.

Conditions: Packed snow/ice on most roads, hit a bit of frozen stuff in parking lanes, and black ice on the two "cleared" roads. Temperatures just a bit below freezing.

This worked out very well for these conditions. I'll probably send it a bit lower if I'm faced with fluffy piles o' snow.