 As you increase your payloads, as you increase the size of the tractor to get more ballast, to get more horsepower, you're pulling bigger implements, bigger tools. Things get heavier and heavier, and the tires are really what carries all of that weight. You're also going to have a tire that's going to generate a giant footprint to protect your soil from compaction. He talks about the most important things to consider when choosing the right tires.