I asked this very same question on another forum yesterday, as I was trying to gauge the wear rate of it for an upcoming trip. It is 8mm. Mine won’t make it, which is annoying, as it still has 5mm on it. I was planning on replacing it like for like in a couple of weeks time, but they are like hens teeth, so have ordered a pair of Conti Trail Attack 3 to be fitted. The old pair of Anakees will do for next winter.