Did your model come with the bridgestones or the Dunlop (goodyear) tires? Mine had the Dunlop Grandtrek tires. I thought they drove very nicely, were quiet, and felt pretty planted. - And my first trip was -20* and icy. Gripped OK. I just wanted a more all terrain tire than a pure street tread. I'm mostly curious because I have another set of wheels so I could keep them an some other wheels as a backup set. Otherwise I'll sell them and maybe get a set of baby Iroks for the other wheels since they are cheap and would be about ideal for moab weekends if I can live with the road manners for the 4 hour drive down there.
I have airbags on my 96 - and have been happy with them when loaded, but not super impressed unloaded. To me they fell to linear - almost jarring - as the spring rate increases on the big bumps. To me it would be ideal to have more like a 1/2" valve that could be left open so when you're unloaded there's no effect, then loaded you could add air and firm up the rear. I've put way more than I ever should in the back of my old 4runner - I carried home 30 80lbs sacks of concrete once. Another time I towed a big tracked skid steer on a trailer - way too heavy for a 4runner -not a great idea, but the airbags sure helped a lot. So I've generally been more positive than negative, but I'm not sure about this rig yet.
I haven't carried enough weight to even know how this one does yet. Any idea if the trail spring rates are the same as the SR5?