[RockyMtnRay]

I haven't done this but it does make sense for two reasons: (1) it compensates for the loss of pressure that will occur because of lower winter temperatures and possible very slow leakage that many tires have; and (2) it reduces the sidewall bulge above the tire contact point. Reading between the lines in the linked instructions, it is this sidewall bulge that's most susceptible to ozone cracking (which leads to premature tire failure).

However, I note that Goodyear recommends the over pressure technique only if the trailer has to be stored with its weight on the tires. I currently have the front of my trailer setting on the front scissor jacks so the tongue could be folded. I'm thinking of cranking down the rear scissor jacks to raise the rear enough that most, if not all, of its weight will be off the tires. It's on a level concrete garage floor so there shouldn't be any frame twisting if I am careful about cranking down the rear jacks by the same amount. Anyone else doing this?