I Have a 2017 F250 GVWR 10,000 lbs, rear GAWR 6340, front GAWR 4400, E rated tires at 3640 lbs. I have added 8600 lb Timbrens, lower stable loads and a Hellwig bigwig sway bar. I weighed my truck full...
^19.5s would be the safest choice of course, but I'm around 8k on the rear axle on various OE rims and good tires with 3700-4000lb ratings. I'm not advocating it to others and I'm sure it's to the chagrin of the weight police, but I'm comfortable doing it. Maybe I did or seen too many ridiculous things with pickups over the years, that being at or a couple hundred lbs over a rated capacity that has a considerable factor of safety on it doesn't bother me.