Tires, what are you using? Trailer? Truck?
I just bought a used 5th wheel and I need to replace the tires. I'm not new to trailering but I know that trailer tires can really be a pain. I am used to using truck tires on trailers, however, LT2...
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Was this in response to me? What do you mean by "derating"? A G rated tire at 80 psi will support my trailer loaded at its complete GVWR. At its unloaded weight, an E rated tire would support the trailer at something like 60 psi.
A main reason we use a bit higher load capacity tire on a trailer is to gain some reserve capacity. Derating a load G tire to 80 psi has lost any advantage over a 80 psi E tire. Another downside is a G tire is a very heavy tire and can run hotter at 80 psi than at higher pressures. Hell any tire can run hot when its pressures is derated by 30 psi while carrying a load.
I'm confident that a steel wheel is way stronger in every direction than the rubber tire it holds.
Having pulled for a living I've seen the results (split bead seats and cracked valleys from over pressuring/over loading steel and aluminum wheels. I would say that over a 10 year period the wheel has more service time left than the tire.
Wheels have pressure and load ratings for a reason.
