Summer tires in Winter

[Dave928]

both actually.

ambient will cold-soak the tire while the car sits overnight and/or during your workday. then the tire still won't build up much heat from friction on the cold road, especially if there's frost or snow as you're not even in contact with the road.

winter tires will stay pliable to temps much lower than summer tires.

all-season tires can have the same temperature issues as summer tires. they are not the same thing as WINTER tires.

[coreseller]

Good advice above, do not drive it with summer tires below 40 degrees.

[j.fro]

Get hooked up with the local Porsche club, SCCA, or other organization that holds autocross events through the cold months. Take your car to one of these and find out safely just how your car behaves with the summer tires in cold weather. If you've gotta use the summer tires this winter, this will help you understand the limits.

[stephen wilson]

I've run my PS2's the last 2 winters with no issues. I just treat is like a motorcycle: never with any moisture/frost on the ground. You just have to respect the lower limits, which with these tires is still greater than most of the cars around you.