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Does anyone know what the minimum temperature is for these tires to just be on the car supporting the vehicle's weight in below freezing temperatures? They're supposed to be more Pilot Sport Cup 2 than the normal PS4S tires. So, even less cold weather tolerant?

I thought I might limp through winter months just leaving them mounted on the stock rims until spring (just not driving on them), but I've seen somewhere that at 20f (-7c?) PS4s tires shouldn't even be supporting weight. They can crack, etc.

I don't want to take that chance if that's current information.