Sam's would probably have a heart attack with my 93 Dakota 4x4, the door sticker lists 4 different tire sizes! I don't need tires, but just seeing what they say might be interesting.
My Dakota has 235LT x 75 x 15 tires with an aggressive mud & snow design. I swapped them off my 50 4x4 when it got wrecked. They take a bit of power to get them rolling, ride sort of rough and I'm sure the thread pattern is not helping my gas mileage, but they will probably be the last tires this truck will see. I have driven the truck less then 3,000 miles in the last 2 years. Rust will kill it long before it wears anything out. Gene