I am kinda partial to the 245/75s as we freguently drive/park/camp on grass/dirt/etc. and spreading the load over a wider tire seems to make sense to limit (somewhat) sinking in.
245/75s are slightly wider than the current 235/80s (about 0.4 inches). So my question. What is reasonable left/right clearence for a tire? Current 235/80s have a little over an inch between the sidewall the grease fitting on the wetbolts.
My figuring is that 245/75 could reduce this to about 0.8 inches.
I have 5200 lb axles and LT215/85-16 E tires on the 5er and 3/8" clearance on the inside of my tires (tires to the shock mount) on the 5er. Not even close on the outside.
Also the LT245/75-16 has 3042 lbs capacity and the smaller LT225/75-16 E has 2680 lb capacity which covers your 4400 lb axles with lots of reserve.
You sure don't want a G614 on 4400 lb axles. IMO trailers unlike a tow vehicle can be over tired.