AS a couple of said. Are you running light truck tires or trailer tires. And I dont think Im nose hi. It sits prety level. Those of you running tri axles what are you doing. Thanks for all help to resolve this mess.
Many toy haulers I see on the road are nose high. That may result in weights beyond the tire rating. Also the rear axle is most likely the one involved in curb hopping. Something that is easy to do with a 5th wheel and you may not even know you have done it especially if it was only the rear axle that hopped the curb. My guess is many tire failures are a result of curb hopping and the failure may not occur for many miles later.
Hook it up and put a LEVEL on the frame. NOW you will know if you are nose high or not.
An inch or two is tough to 'eyeball' on a trailer that long. And it is exacerbated if/when you hit a curb, as previously noted. And yes junk tires could be a contributing factor as well.
That really does cover the spectrum. Do start at 'level' though.
on edit; Dragging Brakes will generate heat as well, but you'd probably smell it when you stopped? Solution, check tire pressures when cold, then at lunch or a ways down the rode. Check them again, HOT.
If both rears are High when hot. you are probably nose high as well. Check for uneven heat in hubs as well. I haven't bought one, but I read that Harbor Freight sells a remote temperature sensing device as well.
2011 Dodge 1500 C'boy Caddy
2000 Jayco C 28' Ford chassis w V-10 E450
Doghouse 36' or so Trophy Classic TT