It's. DMAX 2500 HD with air bags. It's laughable to think he should be looking at travel trailers. I we t through the whole weights thing as well however mine is a 2500 non hd gas. I decided to base my decisions on the gawr and going over the gvwr at little is okay. The axle rating on your truck as said previously is limited by the tire size. There are a lot of people who give the numbers no thought and just hook & go. Then there are folks who are so strict with the numbers they wouldn't tow more than a 25' travel trailer with that truck. I think because you are considering the numbers at least puts you in the middle. As said above you will just have to decide which rating numbers to go by. Great thread yall!