The placard and n my 312bhts says run the Good Year Endurance tires at 80 psi. But the weight/ pressure table on Goodyear’s site says 70 psi for 3000 lbs which would be right for a 11,500 lb trailer (max geoss) with 4 tires. So. Why does GD recommend 80? Seems a softer ride might be enjoyed at 70 or 75.