The wheel also has a psi rating. Probably 50#.
I asked the same question at various tire shops including popular on line shops and received the same answer.
"Putting a D tire @ 65# will not harm the steel or aluminum OEM wheel rated at 50#."
Im not saying its right or wrong to do it, it's just the common answer i received.
Moving up a step in tire size is not that much of a price difference therefore i can't see them saying it to make more money.
On your trailer, are the wheels hub or lug centric ? Hub is stronger to support the weight on the axle hub, i have seen lug centric wheels crack n split when overloaded while snapping off the lugs. It occurs when after market wheels are installed on vehicles and then overloaded.
how to tell if a wheel is hub centric or lug centricPersonally i feel comfortable enough to increase the tire size and have been doing it for many years. Im running 4 different trailers on the road covering a lot of miles and have had no issues. All my wheels are hub centric and slightly over the psi but not over the load rating. I have never seen a visible crack in any wheel.
You dont have to run the new tires at 65#, run them at 55 or 60. They will decrease the load a bit but you are already within your gross specs so its not a problem in your case or mine.
