IMO, it's a fair question. From what I can figure, GVWR is often less than the combined limits of the front and rear axles. So what factors go into setting GVWR? Is it stock tire load capacity? Is it frame capacity? Is it based on braking performance?
Vehicle registration fees are at least partly based on GVWR in many states so there is some benefit to owners for the GVWR to stay below certain levels.
I've noticed that the F150 can be delivered in a number of different GVWR capacities but I can't imagine the 6800# and 7000# versions have different axles, springs, brakes, or frames.
It makes sense that we don't want to exceed axle ratings as bearings and axle shafts can and do break. It makes sense to not exceed tire ratings because tires can and do blow from being overloaded. But if you are under on those ratings but over GVWR, what's likely to happen?
Is there anyone with direct knowledge of how GVRW is set by the manufacturers that can chime in?
