I put the ST maxx on my dually last summer. They were really "floaty" at first, like if you jerked the wheel it felt like the sidewall had a lot of movement. A week after I got them I pulled over 17,000 pounds 2,000 miles and they were great. No complaints other than a little noise, but that doesn't bother me. I got stuck every single time I hooked up to the toyhauler with my previous tires, with the ST maxx I haven't been stuck since.
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