I own several pairs of shoes that I rotate through when running distance.  I track mileage on each pair through my run app on my phone so I have an accurate idea of how long these lasted.  Just shy of 150 tracked miles on these I went out for a sunny lunch time run, but not to far after I started I noticed something didn't feel right.  I looked at the bottom of my left shoe and discovered that one of the black treads was coming loose.  I continued on but the problem got worse so I turned back.  By the time I returned to my vehicle, 3 rows of the black tread had fallen off leaving nothing but thin foam under my forefoot.  I wouldn't plan on buying these if you are doing any distance running on concrete, they just don't last!