The payload on the earlier 1/4 ton trailers was very ilmited due to the use of truck springs (Jeep) used on the trailer instead of proper trailer springs. Truck springs will not hold a load like the way properly designed trailer springs will. The M101Cdn2 (Iltis trailer) has trailer springs, so in that regard are superior to the earlier trailers which used truck components, likely for commonality. The commonality would reduce the numebr of spare parts required to be carried in the supply system.
The trailer ratings are cross country. They ussualy can be increased 50% to 100% for highway travel. I would suggest that in the case of the M101Cdn2, the real limiting factor for the trailer is the smallish size. The springs are, if memory serves, rated for 3,000 pounds, the michelin tires will handle 8,000 pounds. The hitch would likely be good for 30,000.
Perhaps the weak point is those little tiny wheel bearings, which are often neglected. They need regular (annual) repacking.
Of course, as with any trailer, you have to ensure sufficient toungue weight, or you will observe the trailer bouncing back and forth in the next lanes in your rear view mirror.
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