I picked up a set of K60's from these guys last spring for my GS. I rode all over AK then back to Colorado, put a ton of miles on them during the summer and I still have good tread left. They have squared off a bit but not any worse than the other dual sport tires I have riden. They are a lot better than the Tourances on the dirt and just as good on the pavement. I definitely recommend Adventure Cycleworks! They will bend over backwards to solve any problems you run into and love to share their knowledge of the state. FYI - When I got to Fairbanks and switched to the K60's my old tires had enough life left I didn't want to just throw them away. These guys taped them together and gave me a shipping lable. I shipped them home to Colorado snail mail from the North Pole post office for $30. For those planning a trip this worked out to be a great option and Adventure Cycleworks will give you a great price on tires.