We have a 52' race trailer with 2 sw tandems. It was designed for a single dragster and all of the nice features like a bathroom, toolchests and such.
We gutted it and now haul two 2700 lb cars.
The tires are 12R 22.5 - as I understand are usually used on busses and firetrucks. The trailer weighs about 25k dry, so about 36k loaded.
Pressures are set at 120 psi every morning at pre-trip and I see an average of 140-150 psi hot.
This company has had issues with this trailer blowing rubber way before I signed on. I thought it was wierd and due to lack of maintenance....until I took over. Had a blowout in Atlanta a couple of days ago, and now I see another tire starting to split.
The trailer is rated at 40K , the tires I believe to be rated at around 7390 lbs each.
So the tires allow about 30k total, my guess is it's overweight. Is 6K lbs enough to constantly blow rubber?