A little over 4,000 Kms on the Continental Twinduro TCK-80 tires and I must say these have been great tires. Again, most of my daily riding is pure abuse, accelerating hard and wheelie-ing all the way to the office and home again, with some weekend rides to fire roads and trails through the woods. They're a very competent performer off-pavement, not the greatest in mud (but decent), perfect for gravel roads, quiet on the asphalt and very good grip in the rain.
A few weeks ago I had been riding offroad all afternoon with 15 psi in the tires, and forgot to pump them back up before getting on th highway for the hour-long ride home at 120 Km/hr. This stupid move on my part probably cost 20 % of the tire's entire life.
Odometer: 17,401 Km