[Roach711]

LT tire max inflation is typically 80 lbs but you can inflate to lower pressures if you don't load them to max capacity. Download the inflation chart for the tires you have then take the van to a local truck scale to get an accurate loaded weight for each axle.

My van conversion added 1600 lbs or so (most of which is on the rear axle) and my axle weights front and back are nearly equal. The inflation chart for my Nexen tires says I can inflate them to 55 lbs at that axle loading. I've been running them at this pressure for 15,000 miles and the tire wear looks fine. The ride is definitely better as well.