@Dirt_Dad - One of the things I really like about the K60s is how even though I flatten the center out on road riding, when I hit the gravel and lean over, those lugs bite! Today, looking at my k60 rear with 9k on it, it has about the same depth of tread in the middle as my wife's
new Conti-Trails have.
But I hear you, the K60's don't like wheel spin off pavement. It takes them down faster. Hmmm, wait, I think that's probably true for all tires!
Love to hear how your wear is on the Metzler Karoo 3's. Supposed to wear better, but they don't look like a 50-50 tire to me, more 70-30 with the bias to pavement.