Nobody answered this so I'll comment even though it's a month old. I had a stock from Detroit 1972 Chevy station wagon (the tub with drop down tail gate, big block V8) back then and it had sheet, full coverage hub caps....thin and flimsy and held in place with clips that bit into the wheel. For years I had this squeaking sound that I couldn't find in the vehicle till one day I had rotated the tires and had to do an errand before I got the wheel covers back on.
In short the squeak was gone. In my estimation, the wheels were bending as the vehicle rolled down the road the the squeaking was the cover's teeth moving against the wheel as it (the wheel) flexed. So they do flex. Fine.
So, not knowing the rating, which is usually well over any normal usage for a (some government agency) safety factor, what would be the possible outcome? Hub studs would break (not the wheel's fault) or the wheel would deform permanently. I think before the latter occurred, you the operator, would notice something isn't right and start investigating and if you did you job you would know the wheels are flexing well before you had a problem.
Now with that and a buck or so you can get a cup of coffee.
Oh, my 6530 came new with Titans all around (4wd farm lug forget which F1 or F4), wheels and tires. They are not cheap junk by any means and my guess is you couldn't find a tire that wouldn't fail before the wheel "fell off". But steel, unlike some other materials has a very high tolerance for flexing (work hardening) before any permanent degradation occurs. I have seen after market aluminum wheels for road vehicles with the max load stamped inside, but never anything else. Course cast aluminum essentially has no work hardening resistance. Bend it once, it fractures, and on the way back it breaks. I guess if it mattered it'd be posted like the tire loads are posted.
HTH,
Mark
