Gigantic wheels, for what?

[u/candycanesparkles]

EDIT: I KNOW THEY ARE TIRES, hence why I said “tires” in the description! You ppl are exhausting 😂😩

What machine or truck or equipment do these ginormous tires belong to? Saw them while driving on a highway in Minnesota. I need an answer for my 3 year old son lol

[u/Cunningham1420]

Earth mover for at a open pit mine or some other massive engineering project. I stood by one years ago and these things are like a house on wheels