A tyre has a qweight rating also. This rate rating is at the max tyre pressure..
As the pressure drops so does the weight rating...
I have previously used the same as a car at around 35psi.
Trailers SHOULD have higheer rated ciommercial vechile type tyres.. hence the higher pressure weight rating than Std radial car tyres
Trailers/ van tyres are very different to 'car ' tyres.
you can run commercial tyre on a car but not the other way around...
A manufacturers plate on my trailer says to inflate to 60PSI.
We are assuming that the default tyres that the trailer manufacturer specifies are still the type on the trailer..
IE never has a tyre blow out, wear out and been replaced..
Which is were this post applies
Have a look on the tyres , should have written on them the maximum pressure to inflate them to
My duel axle runs at about 50lbs.. uit tows well at 40 and up.. below that due to weight and flex on the walls they warm up, but still tows well.
Also of note, the tyre rating /I have at full pressure, I can blow out 2 tyres, one each side and still have the weight of the trailer / boat withing the tyre rating.
If it is a front tyre blown.. that needs to be removed as when it eventually shreds, the wire will cause the tyre behind it to puncture.
If a rear tyre, then needs to be removed as debris can be a hazard to following vehicles as it flys off.
The balance of weight between the 2 axles needs a little more on the front wheels, and square or slight toe in, to enable good tracking behind the vechile... A combination of load position and axle positions.
The rear needs a slight square toe out.. this is so you have steering on the rear axles to enable good reversing.