K-rads are great tires for street and hardpack. They do need to be inflated to at least 40psi or they will pinch flat immediately, so they are pretty hard, which takes some getting used to. Great value!
I put these on my 1998 Gary Fisher Gitche Gumee for commuting to work. My ride consists of gravel, hard trail, rough pavement and gravely edges of roadway. So far...Awesome! These are big tires and they feel like they can handle anything. I am running them with 65 lbs and they are pretty quiet and reasonably fast. On top of that, they look good!