Cars do, shoes do, and so do tires.
The various tire brands they replaced still had usable tread remaining. We fully expect an even greater wet performance enhancement once this technology is incorporated into more conventional tires for mainstream vehicles. Tire performance can be impacted by wear and other factors. After a lot of hard work, primarily at Bridgestone's Technical Center in Tokyo, the engineers succeeded. According to the U.S. Department of Transportation, average tire life is 41,000 miles.