Here is my setup, a 2008 F250 SRW 6.4L Diesel "STOCK" 17" tires.

I am very pleased. Very pleased… with the way the truck handles

Without trailer

Front 4800 Whew…. It is a diesel...
Rear 3720 (with Pull-rite hitch) about an additional 200 lbs.

With trailer

Front 4800 (wow, the same, which is good)
Rear 5940
Trailer 9600

Front is the same, I think this tells me that I am not overloaded in the back, because I would think it would lift on the front if it were. Rear has increased by 2220 lbs tongue weight (19%) and the trailer is, what the trailer is… (11,800 total (WET Weight!!!)) Holy Moses…

GVWR is 9800 (which means I am over by 1000 lbs.).
Front GAWR is 5250, which is above the actual front weight by 450 lbs.
Rear GAWR is 6100 which is above the actual 5940 lbs (160 lbs less)

Single rear tires with a rating of 3185 lbs. each. (6370 lbs. total)

Remember I said that you do not (DO NOT) want to exceed your tires or wheels maximum limits. You can, and you know you might be fine. But it will come back to haunt you. And the time lost on my vacation is far more valuable then taking the risk. JMHO

To summarize, the rear axle can have a max. of 6100 and the current tires a max. of 6370 lbs. My current rear weight with the 5th wheel is 5940 lbs. So all is well within the specs for the truckl (other than GVWR) and it drives well.

So I tow an 11,800# (WET!!!) 5er, with an 8220# truck with a diesel engine... and have no issues. I love it... but remember you need to STOP!. I have an outstanding brake system on the 5er, this is important.

Eric

BTW... It is a 30ft Alpenlite 5er