I wouldn't run track tires below 40 degrees. Depending on the treadwear they can get brittle and crack.How do you find the winters work? Im trying to convince myself that if I get a set of 18x11s for track use, I can get some a designated winter tires for my current 18x9.5 and really drive the car in all winter here. We have a steep hill coming into the hood that many FWD and almost all RWD gt stuck on in new fresh snow, so in legit storms I just drive the truck, but my race rubber is pretty dicey in general in the 30s and 40s on clean pavement.