Any benefit going from D to E load rating on trailer tires?

I have a cargo trailer I am converting to a camper. It is a 20 ft trailer and has 2 3500lb axles with aluminum wheels and cheaper tires. The trailer will only have a couple cabinets in it it, a bed and camping gear and will be well under the load ratings. I am wanting to upgrade the tires to a better brand. To change to an E rated tire I would need to upgrade the wheels to take the higher pressure load. Will E rated tires take the heat better, last longer and be less likely to have a blowout?

 

I’d say no - there is no benefit. You’ll get two more plies of sidewall, more weight and more carrying capacity but 4 D rated tires will already carry more weight than the Tundra is rated to tow or the trailer axles can carry.

Because the tires won’t be overloaded, I don’t think any of your concerns are valid.