Just got a set of Nitto NT01's for the Miata. Putting them on a set of Kosei rims that currently have Hankook C71 autocross tires. Two are worn and two are good so want to keep the good two for possible later use. Also currently have the hollow Alloys that came on my 99 Miata with Falken Zeix 912 with low mileage. Would like to keep them in good shape also. Plan on leaving the Nitto's on the car and driving to/from events. Would like to move the extra tires out of the garage as space is becoming premium. My house has a crawlspace that is kinda tall. A little more than 3 feet at the short end and 6 foot at the tall end. So naturally I do use it for storage and would like to put the tires down there. Always cool and dark with same humidity as outside or in garage. Would it be best to put the tires in plastic bags to preserve them? Any other tricks I should consider?