I can't say that AT heavy lugged tires would be my choice for deep, coarse sand. Generally, the finer the tread, the better on sand. The real, and only, trick is airing down. I'd get down to 22-24 psi and if she still spins, get down to 16-18 psi. Much lower than that and you've got to be careful with steering, ruts, etc because you can pop a tire off of the bead easily. That said, I've dropped my old Trooper tires down to 10 in an emergency (below high tide line on an incoming tide, by myself, and on the verge of losing my truck) I run my old diesel Superduty on sand extensively, for miles on end, on the NC Outer Banks. She's close to 10,000 lbs fully loaded and I never have an ounce of trouble at 18-20 psi. PITA to air back up, but it's the only way to assure you won't dig in.