Does your trailer have the proper tongue weight? If it's too light, you'll never solve any of your problems with tires!
The more I think about this the more I think, could this be what's happening? Just the opposite of the tire side wall rolling around is there just not enough load on them? Everything I read says get the front bumper within 1/2" of normal ride height with the WDH. The tongue weight of the trailer is theoretically around 450 to 500 pounds. The trailer is somewhere around 4000 pounds.
