Sometimes you find question about if pressure chanched when you put fi 65 psi in tire off the ground, and then load it. And endconclusion is always no.
So connecting the inner and outer tire with a tube, is only handy for filling the tires with exactly the same pressure. But on a sideward curved road, it has no or marginal influence on how the load is devided.
Probably even no air is transported from inner to outer tire.
And overloading rear axle is not only class C related.
But if overloaded, and tires are yust enaugh for the GAWR , then you better use higher pressure then belonging to loadrange.
I know , not allowed ( anymore) , but better then tire-failure.
Upgrading tires to more maxload then is the best solution.
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