Are Airless Tires the Way of the Future?

Imagine a hybrid tire that can change tread patterns to suit the application, from a deep block lug for traction to a smooth rib for fuel efficiency, or a tire that runs just on its shoulders for optimum fuel efficiency or on a full tread face for better traction. How about a tire/wheel assembly that leans into a turn for better traction and stability? Equipment Editor Jim Park has a fun look at possible tires of the future in his "On the Road" blog.