In the 2nd year after buying my '14 FiST, I needed to put all-season tires on the car. The original RE050 tires went in the basement at about half tread. I tried to sell them, but nobody was interested. Now the car needs tires again and all-seasons are no longer a requirement. After 4+ years of storage, should these RE050s still be ok to use? They look fine, but I know they have a special compound that is sensitive to low temps, etc. I don't know how age affects them. The basement naturally maintains a steady temperature. Any insight would be appreciated!