Just a couple of considerations. Denny mentioned the covers for RV tires, I think they could be effective, but not a cure-all. The two biggest issues for tire failure (excluding road hazard) are under-inflated/overloaded, and the ozone damage to the sidewalls (causes cracking). The ozone is especially prevalent if tires are stored near electric motors, or where they get UV light exposure (think sun). So the covers could help, and should be used if available. But under-inflation and overloading are by far the bigger issue. Keep in mind that tire pressures change as seasons do, and that no tire is totally impermeable, so air loss will happen over time. Different brands of tires do lose air at different rates, mainly related to the formulation of the inner liner, and the tire design. None of them maintains pressure without somer ]level of attention and monitoring. Just checking them once per month would make a huge difference if everyone would do it.