https://g05.bimmerpost.com/forums/sh....php?t=1789598
Summer tires become dangerous in temps less than 40-45 degrees as the rubber compound doesn't handle well in cold temps. I've found 2 all-season options in the 22's, Pirelli Scorpion Verde and Nitto NT420V. The Nitto are almost half the cost of the Pirelli's.