diplomatdon you may have many tousend of miles driving big rigs but you also states doing so legally and safely, I don't belive it a good idear to tell someone to ad weight out over rear of axles as you talk about Semitrailer not FW, you don't know the ratings of tiers, and he admits to not looking after them, ? Do hi checks his psi, and for ading larger tiers on rims that may not be right sies or rating. Maybe if he goes faster he will take som of the weight of the rear tiers. I forgot when he stops it all comes forward, silly me. Have a god day.
Frank.