I've never pulled a 28' to speak of, but a couple of trailer dealers that I know and trust have always told me that a 28' triple axle works better on a single wheel truck than a 24' tandem axle (especially a wider one). They say that the triple axle takes a lot of weight off the truck and will pull better and they consider it safer. They both also said that a 6'8" (or wider) x 24' trailer is much harder on tires, because you can simply get so much weight on them. I do believe that, because I went with a 6' x 24' last time because I was driving a 3/4 ton truck, and hauling in and out of a sale barn every week, I knew it would get fully loaded regularly, so I went with a 6' wide because I figured that was plenty of weight for the 3/4 ton. I know that tires hold up a lot longer on the 6 wide than on my previous 6'8" x 24', and the other wider 24's I've been around. If I wanted more than a 6' x 24', especially to pull with a single wheel truck, I'd have to look hard at a 28' triple axle.