A couple years ago at the University of Idaho camping symposium, we discussed weights very thoroughly. The advice of the instructor who drove OTR trucks and was pulling his 5er, (heavy one but I can't remember the name), with a Peterbilt. His best statement was that a rig that sits close to 100% of weights, will eventually suffer, because every time you hit a bump in the road your load factor increases. His recommendation was no more than 80% leaving a good safety margin, which was why he was driving a Peterbilt.
Another thing I learned about blow outs is both the tires on that side should be replaced as the good tire carries the entire weight and will usually damage the plys on the good tire....
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