Tire inflation depends in part on vehicle loading. My '97 F-250 empty gets even tire wear with 50 psi front/ 60 psi rear (front axle 2900, rear 3100) empty (there is a 40gal LP tank in the bed). When towing (3200 fr/ 4700 rear, 10,000 lb 5th wheel) I run 60 fr... Login to read more.