It is stock a stock suspension. However, as you probably know the ‘stock’ Trail Boss has a factory 2” lift. I did not add anything additional to it and there is zero rub on these tires.
Thanks to all the info I read here, I just put Toyo Open Country AT3’s, 295/70/18s, on my 2021 Trail Boss. Wanted to avoid any further suspension mods and keep with the factory wheels so I went this route. I’m very pleased with these as they really filled the wheel wells in better but without the excessive weight and drag of a larger tire, wheel, lift combo. Smooth running tire, no rubbing at all, fairly quiet on the highway also.