... Is Lego! Yeap. Believe it or not, they're the champions in terms of tire units produced. Nowadays, about 31 billion pieces are made in the four Lego factories in the world. If put side by side, all the pieces sold in one year would be enough to go around the world five times. That's a loooooooooooooooOOOooooooooot of Lego, dude.