When the topic of trailer sway comes up, you see many opinions on the obvious (load it right/use sway control/use WDH set up/increase tongue weight/WB of tow vehicle/single axle or dual axle...you name it)........most often overlooked and hardly ever mentioned is good tow vehicle tires and good trailer tires, stiffer the side walls the better........P rated tires aren't meant for towing/load bearing, they're meant to give a quiet, cushy, comfy ride with soft shock absorbing sidewalls, not what you want at all.....LT rated truck tires like BFG All Terrain KO2's or Goodyear Duratracs (many other good LT tires out there as well) for the truck and Goodyear Endurance radials for the trailer........ and never look back!