JUeckert:
I'm not sure if you simply make up the facts you need to back up an argument or, are simply misinformed.
I went to the Tire Rack
Tire Rack - Your performance experts for tires and wheels website and looked up tire size LT225/70 R19.5 and found that the overall diameter is 32". Then I keyed in LT235/85 R16 and found the overall diameter of that tire is 31.7". As I wrote in an earlier post above, the difference in size between these two common tires is 0.3" or 3/10". As I wrote, the difference is a fraction of an inch. That tiny fraction of an inch would not be noticeable for load starting ability and would make a difference of perhaps 30 rpm at highway cruise speed in top gear.
I will not bother to go do all the research to disprove everything you wrote, but I am confident that I could if I was willing to go to the trouble. I will just simply say I believe everything you wrote is wrong, incorrect, and I disagree with you.
This is a Dodge-Cummins website. You will have a very difficult time convincing TDR members of the merit of Furd diesels or trucks. Perhaps you are on the wrong website.