Vedddy interesting.
Many of us folks who are running Load Range E tires (80 psi) are complaining about the extra "trailer bounce" with tires that hard. The fine china is getting a bit more jumbled. In fact, some are lowering the psi (while staying within the necessary load capacity) to get a bit softer ride.
I expect there may be some of the same experiences if you take the Marathon Load Range D tires up to 70-75 psi.
Dave
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