Tire pressures. How can this be?

bbaker2001 wrote:
so if part of the weight is pin weight, when unhitched, what happens to the weight.
also is it ok to set down stablizers when unhitched to take some weight off tires and frame

When you unhitch, the front legs take the burden. You can put down the rear stabilizers, but you're not going to take much weight off the tires because the stabilizers aren't designed to lift the trailer, just make it a bit more solid by adding a stabilizing force.