| As for worrying about the sun destroying them? Well, how come nobody worries about the sun destroying the tires on your truck, or on your wife's car? If you are concerned about that, make some plywood covers to lean against them when the rig is parked.
trailer tires are actually made quite differently than car/truck tires, and part of the process makes them susceptible to deterioration from the elements over time.
this link was posted earlier - there's a good description of it in the article:
http://www.carlisletire.com/product_care/articles/trailer_tire_safe... |