I have several extra tires, two on a spare wheelset, and others in a bundle. I am not riding as much as I was a year ago, so I will not be wearing out tires as fast as I was.
What is the best way and conditions to store these tires so that the rubber doesn't just crack and split when I put them on wheels and pump them up?
Note: I don't know if it makes a difference, but I live at about 5000' of elevation in a very dry climate; forced air heating is used in my apartment about 6 months a year.
More info as an example: I had tires mounted on wheels, deflated, hanging from ceiling hooks. I don't know how long it was that I hadn't used them but it was probably 12+ months. When I inflated them a week ago to the recommended pressure the sidewalls showed cracking parallel to the rim on the whole, or nearly the whole circumference of the tire.