Don't spin them so much lol.
I've got 17,000km on mine now, I'd say I'm at about 75% tread life left, but mine have a done a lot of heavy towing in the summer so I'm more than happy with that. They wear better than both the Hankook Dynapro ATM's and Toyo MT's I had on the truck before.
I also worked with a welder that had him on his welding rig, at 40,000 km they were only about half wore out.
Just put mine on this spring. So far love the tire. Reasonable noise.