I ran with the K60's for a while, can't say they were worth fitting. As previously mentioned they don't work in Mud and they don't last if you use them a lot on the road, so to me all they did was look like a more off road tyre than the tourance's did, grip wise I never road on anything where the K60's worked where the tourances wouldn't have worked just as well.

I'm beginning to think that the whole concept of a 50/50 tyre is purely a styling exercise rather than offering any real practical benefit, although I stand waiting to be corrected on that.