All of what you say is true, and would account for the big differences in frame strength of the trailer deck. But what I was trying to point out is the big difference in the strength in the hitch area. When a GN is being pulled, the pull forces are at the bottom end of a "lever" created by the GN of the trailer. Therefore the trailer upper frame is not just being pulled straight forward, but being pulled by kind of a twisting force that is attempting to pull the frontmost part of the upper frame "up". With the lighter frame of the 5er, and its relatively close up 5er pin, then the pull forces are much more straight forward, and the lighter frame does that quite well. In normal smooth road pulling, neither of these differences is significant. But where there is a problem is when the trailer begins "chucking" (forcefully moving backward and forward compared to the truck). The chucking is probably caused by joints or wear spots in the pavement. Some roads are horrible for this problem, and can do serious damage to the 5er trailer. The big forces caused by chucking are amplified by the extended length of the GN adapter (that I thought about buying). The chucking problem is severe enough that it has spawned a new industry of making 5er trailer pin boxes with air bag cushions, shock absorbers, or rubber mountings for the hitch pin. Mor-Ryde is one I have considered as it seems to be cost effective and simple compared to its competitors.
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Today's Featured Article - When Push Comes to Shove - by Dave Patterson. When I was a “kid” (still am to a deree) about two I guess, my parents couldn’t find me one day. They were horrified (we lived by the railroad), my mother thought the worst: "He’s been run over by a train, he’s gone forever!" Where did they find me? Perched up on the seat of the tractor. I’d probably plowed about 3000 acres (in my head anyway) by the time they found me. This is where my love for tractors started and has only gotten worse in my tender 50 yrs on this “green planet”. I’m par
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