Well the vehicle seats 8, and has a tow capacity of 4500 lbs, although the Honda website doesn't give the exact weight capacities. You may have to look at the tire load rating on the specific vehicle you are interested in, and then subtract off the curb weight as an indicator of it's theoretical load max. At that point, spring capacity should come into play as determining whether you'd ever be able to hit that theoretical max.
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You may want to send an email to isellhondas to see if he has Honda documentation as to actual published load capacity.