I keep 60 in front and 50-55 in the rear in my factory 20s with Goodyear Wrangler AT/S'. They seem to wearing OK and I rarely haul anything with any weight. When the snowplow goes on, the front go to 80psi and the rear to 65psi with a bed load of old wheels and tires for ballast. For you folks that run 65 or 85 psi empty, are your tires wearing evenly?