Why do I keep hearing about tyres that can help save on fuel?

Question from visitor, 18/12/2009 :Why do I keep hearing about tyres that can help save on fuel?
Answer by rezulteo, 18/12/2009 :

Well known manufacturers make tyres with low rolling resistance. A lower rolling resistance means that the tyres last longer and save fuel. So a tyre that seems relatively expensive is a better value in the long run.