After briefly grinding down the rubber and creating a toxic fumes hazard in his own garage, the host starts to cut into the tire at about 2:25. By 4:30, he's completely taken a chunk out, which presents the opportunity to see exactly what the layers of the tire look like. These have yellow markings, meaning they are soft tires.
Immediately obvious is just how thin the rubber actually gets. It is thickest around the edge near the wheel, which houses steel beading to keep the tire on the wheel and for strength and support. The metal tapers as it goes through the sidewall, until there is nothing left but rubber. The metal then reappears beneath the contact patch. Check out the full examination in the video above.