Work trailers often, maybe mainly, are not equipped with shock absorbers. Add that to wheel balance and one can see quite a bit of "bounce". Trailer frame flex tends to dampen inputs to the driver (who often is piloting a truck with typically dead-response ball & worm steering). One can feel it in the truck (transmitted vibration) if it is a light duty or pickup based medium duty, but not through the steering. Same for 5'ers heeling over in a crosswind . . . the driver is unaware of how far over is the trailer until too late. Call it then a combined problem.
I too often see references -- and listen to them -- where work trailer owners are expecting tire blowouts and carrying multiple spares as a matter of course, thus I'd rather have shock absorbers and wheel/tire balance on best tires to try and alleviate this. And good alignment. That and TPMS . . anything to keep the heat and problems at bay.
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