How many know their actual pin weight. Serious 5vr's should. Most discussion regarding trucks are more about towing capacity, when it needs to be about pin weight which is the biggest part of cargo ...
You realize that we are just talking about STATIC pin weight here. Actual pin weight is a dynamic number. Uphill, downhill, brakeing and accelerating all affect the dynamic pin weight. Wind lift under the nose of the 5er probably changes the pin weight too.