Gordon, your Newell should have come with H rated tires. It is important that you run H rated tires at least on the steer axle. As you found, you are overloaded on the drive and the steer. You can drop the weight on the drive axle significantly by increasing the pressure on the tag axle up to 8-9k. The only problem is, you will also increase the weight on the steering axle. You mentioned that you had no water on board. Both the water and the waste tanks are very close to the rear axle so they will contribute very little to the steering axle weight. Increasing the pressure on the tag axle will lift the rear up enough to redistribute 2-3k pounds from the drive to the tag (that's a good thing since it should drop you below 20k (much less the 22k plate rating) but will add about 300 pounds to the front axle which without H rated tires you will be exceeding noticeably. At Newell's suggestion, I changed by front tires out to 305/750R24.5. They are very pricey but they do carry a higher load. You may not need the higher rating but I was well overweight even for H rated 11R24.5.
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