Re: Be Careful
Trailer tires spend most of their life in storage. This is ideally done in a dark, cool garage at maximum inflation pressure. Anything you can do to replicate these conditions is good, such as tire covers or shade from a tree or building. The same inflation pressure used for travel should be used for short term storage. Because some common pavement surfaces are not compatible with rubber in long-term storage, a thin piece of wood under the tires will slow the inevitable tire rot.
For long term storage the recommendations are different: Put the trailer on blocks to take the weight off the tires. Then lower the air pressure and cover the tires to protect them from direct sunlight. For winter storage I block the trailer up at each axle, and take the opportunity to inspect the brakes and repack the bearings if necessary.