Freightliner glider questions

That's a #### shame that gliders got crushed like that. I wonder if I'm going overboard on how robust this is looking to be then because I'm never going to buy a newer truck with a DPF, I vehemently object to the idea that they're necessary when considering everything else. Looking at everything again I'm looking at a GVWR of ~72,000 pound without considering the trailer(s) should I go into hauling side dumps, assuming the factory installed lift axle is ~14,000 pounds because it's shown to be outfitted with 11R22.5s and I have yet to find r22.5s or 24.5s with a load index of 150