Could you explain what you mean by uprated? I could see downrating (derating?) a trailer, ie put 10k lb running gear on it and call it 8k, but uprated?
I've never seen an 8k rated trailer either....
Some will add the expected tongue weight (or the empty weight) back on to the axle ratings to come up with the GVWR.
This makes sense IMO, for example if you have a 10k GVWR trailer with 2-5k axles, you can't get 10k on the axles without being over GVWR because you have to have some tongue weight.
The most common one I see do this is Travelong Trailers. Nice trailers, kind of high end and very stout.
The uprating is a nice feature on a well built heavy trailer since the extra weight doesn't reduce your payload.
I have never understood why they derate trailers. Kind of a waste of GVWR
I am with you on this one. Most of the components would not take the weight like the brakes, bearings, and epically the tires. I know, we all over load from time to time, but there is a factor built into everything for the occasional brain fart but doing it on a daily basis will lead to failures.
De rating is common but up rating is not advisable. It would set the manufacture up for a slew of law suits.
Chris