The tires are original to a Cadillac I bought in January 2012. Of the four original tires one had to be replace at 58,000KMs for a bulge that developed. It was an 8 year old tire. All the other tires have good tread remaining but now 9 years old I am going to replace them all.
I live in a climate that varies between -/+ 40C and that it hard on a tire. I know the history of the car was a combination of highway/city which is what I also do. I'm getting rid of them only because of age and rubber does age!
I'm impressed with this tire and will buy it as my replacement for the existing.