Who knows what type of tire the Boler
folks had in mind? You're not running those exact tires. Best to go with the tire manufacturer's recommendation. Your tires' weight
carrying capacity is proportional to the tire inflation. If you run them at 30 psi you are running them at a fraction of their designed weight
carrying capacity. I see no logical reason to do that. That would be like buying a chain to hold up a 1 ton weight
, then sawing halfway through a link before hooking it up your weight.
Looking at it another way: there is no possibility that the extra psi could harm your trailer.