45North Wrathchild, not quite the advertised 2.8 but close. I don't run them any longer but I found them to be awesome in a couple inches of snow and when things slush up and got soft & mucky. The only issue I had with them was when the ground was frozen with out snow, they would lose studs because 45North used their large studs on these tires and they would pull out of the knobs. As I lost studs I replaced them with the smaller standard size and had no more problems. This mostly happened on the rear.