Well the set I have now I had installed in September 2010 the day before I went to Rausch Creek. They have about 25% tread left and about 25,000 miles on them. I know thats not a lot of miles for a set of tires but my front end alignment has been jacked up for quite some time now and the tires are cupping on the outside. Im in need of JBA UCA's. The inner lugs actuall have about 40% tread. Im going through the entire front end next month and will be installing new upper and lower UCA's, along with the passenger side inner and outer tire rod. Just replace the drivers side inner and outer last week cause it was shot.