I am stating what is in the owner’s manual for the vehicle in question. I am not saying anything about the vehicle’s actual towing capacity. In the owners manual, this is often stated in a chart implying there are two different capacities for a given axle/wheelbase combination, one weight carrying and one weight distributing, with the weight distributing number being the max tow capacity and the weight carrying number being lower. That is what I am referring to and what the OP is referring to.
since you seem to be struggling with this, here is a summary article. It is a question of liability and axle weight ratings and has nothing to do with what the truck can physically move for weight.
There is a nice graph in the article if you’re a more visual person for what is stated in the owners manual for each vehicle, but here’s the good parts:
“For instance, the 2015 Ram 1500/2500/3500 owner’s manual says a weight-distribution hitch is required for trailers weighing more than 5,000 pounds.”
“GM’s 2015 Trailering Guide lists typical hitches for Class IV trailers (5,001-10,000 pounds gross trailer weight) as weight-distributing or fifth-wheel, and notes weight-distribution and sway control are required for towing more than 7,000 pounds with a 1500-series Silverado or Sierra (at “50% hitch distribution”).”
“Ford’s towing data list weight-distribution required on F-150 for trailers more than 5,000 pounds (or 500-pound tongue weight) and 6,000/600 pounds behind single-rear wheel SuperDuty pickups.”
https://www.hardworkingtrucks.com/to…-still-needed/
In other words, in order to ACCESS the maximum tow rating of the vehicle, you must be using a weight distribution hitch. I believe we are saying the same thing but you are arguing with me about the way this is presented in the owners manual; I’m not sure what you hope to gain by implying that I’m an idiot who doesn’t understand physics. I am not stating that weight distribution increases a vehicle’s towing capacity. I am stating that the failure to use it REDUCES the towing capacity. There seems to be a reading comprehension issue here, and for that, I can’t help you.