This new Bridgestone Ecopia EP422 tire promises a *range increase of ~ 20 miles for a typical ICE gas with 400 miles of gas-tank range.
Roundy things that go on cars!
Therefore, this tire should enable electric cars to increase range as well, though we're not exactly sure by how much (maybe 2-3 miles on an electric vehicle such as the Nissan LEAF), and the increase would also vary based on whether or not your EV already comes equipped with low-rolling resistance tires.
Per Green Car Congress in regards to this new tire:
"The technology behind the tire improves rolling resistance by controlling the interaction between polymer, filler materials and other rubber chemicals at the molecular level. A fuel saver sidewall compound also helps lower rolling resistance by both returning more energy back to the tire and reducing heat generation as compared to a traditional sidewall."
"Ecopia tires are made using recycled ground rubber, which contributes to at least 5% of the tread compound in every Ecopia tire. Ecopia tires help channel water away from the tire through circumferential grooves, which improve resistance to hydroplaning and increase wet traction."
These tires come with a 70,000 mile limited warranty and there are 43 different sizes to choose from.
Does anyone have experience with these tires? We would love to hear some feedback on them.
*Range projection is based on rolling resistance in lab testing comparing Ecopia EP422 Plus (215/60R16) to Firestone FR710 (non low-rolling resistance tire - 215/60R16) when new
Source: Green Car Congress