We used an Oregon ODOT truck weigh scale near Hat Rock Park East of Umatilla, OR. It was not manned at the time, but they leave the scales powered on and there's a remote digital-weight readout in front of the scale. We were loaded with fuel and water with the waste tanks empty, and leaving on a trip to Spokane so it was good timing. We did not take the time to get corner weights but did get axle weights. Two things I found out: 1) The front axle was right at the maximum for the tires when inflated to their maximum cold pressure - 120 psi on 295/80R22.5 tires. 2) The overall weight of the coach was about 42,500. With the Avalanche in tow the combined weight was near 49,000 pounds.
As a result of my weighing I 1) immediately reduced the downward tag tires' pressure to reduce the weight on the front axle, and 2) checked the tire charts and started using maximum cold psi (120) on the front axle, 115 psi on the duals, and 110 psi on the tags. Under two years later I noticed short, radial cracks in the front axle tires. These cracks were about 3/4" long and right next to the metal wheel near the bead seal. Soon after I switched both front tires out for 315/80R22.5 which I run at 125 psi. They have a 130 psi maximum cold pressure with a 9,090 pound rating; now well over the front axle weight.
