Intersting piece of information on new tires being developed:
http://www.newtechspy.com/...
"The Polyurethane elastomer auto tire has been in development since 2001 and Amerityre claims that it is superior to rubber in almost every way. Environmentally the tire uses 96% less energy to produce than rubber, is 100% recyclable and non-toxic."
" Performance figures are equally impressive with 45% less rolling resistance, giving the tire an average temperature 80˚F cooler than rubber, adding up to 10-20% better fuel economy."
"Lee Iacocca: "A material so dynamic, it will change the way tires are produced forever""