All I can say is that my Tundra handles my trailer quite well. The Winnebago 2201DS weighs in around 6500 lbs. loaded for traveling. We travel with two folding bikes and other gear in the truck bed along with miscellaneous stuff on the back seat. It's only the DW and me in the truck. The 4pt Equalizer hitch works well, and traveling out west (Grand Tetons, Yellowstone, and Glacier National Parks) wasn't a problem. The Tundra handled the mountains better than I expected. In general, I think the Tundra can handle around 7,000 lbs. if properly set up with a WD hitch. Our trailer is under 27' and I tend to think it would be better to avoid anything longer than 28' as the longer the trailer, it becomes a bigger sail.