I bet they handle great

Not that I actually care about quads, but anything tire related is pretty interesting.

http://www.foxnews.com/leisure/2013/03/06/polaris-introducing-flat-proof-airless-tires-next-year/

What's sweet is that in the whole article they never mention that an airless tire *might* result in some undesirable ride characteristics or loss of control. Really, not even a little bit? Great reporting.