For all of you citrus-loving Prius owners out there, orange is the new green. Yokohama has developed a green, eco-friendly, gas-saving tire made out of oranges. Yup, those spherical objects that make your Orange Julius taste good and prevent scurvy are being recruited to help save the earth from performance driving. They’re called “db Super E-Specs” and they are most notable for replacing 80% of the synthetic, petroleum-based rubber in normal tire with a special compound made out of orange oil. If you really want to buff up on your green credentials, be sure to cover the back of your hybrid with pun-laden stickers that note that the Yokohamas are produced in a zero-emissions factory and have 10% less rolling resistance (we used to call rolling resistance “grip” before it became politically incorrect to have a car that could handle) than a conventional tire. What’s the catch? They cost a bit more, and they’re only made in three sizes that are compatible with several hybrid and compact cars. We assume they’ll stay in niche sizes, as we don’t know many hypermiling Nissan GTR owners.

[Source]