on my second set.First set had 52,000 miles on them when I replaced them.I believe I could have gotten another 10,000 before becoming slick.This set is creeping up on 40,000 and wearing very well.I keep an eye on air pressure and regular rotations and visual inspections for front end problems but with 180,000 miles and some wheeling time,never have had to do a front end alignment.Side walls are thin so gotta be carefull not to cut them.