We store our Airstream every winter for about 5-6 months. I was curious if the rubber compound in the axles "wears" or loses its flexibility over time when loaded. The best source is Dexter, so I called their technical support line and asked if the axle would last longer if unloaded during periods of storage. The answer is absolutely yes, the axles will last longer if unloaded during storage. They wouldn't say how much longer, but said the axles definitely will have a longer service life. I place the Airstream on jack stands to unload the axles every winter. We'll see how many years of service we get from the axles before they start to sag and ride rough. FYI