Originally Posted by
1989Pre
Make sure you let us know of your progress. (I'm glad your wife was riding a good distance behind). It's strange that SKS would design something like this. I am not sure what you mean by "lugs", though.
CX tires have more aggressive treads for traction on gravel, dirt, mud, etc. These treads, at least on my tires, protrude out more off to the side, presumably to improve traction on loose surfaces. It was one of this features which I believe caught hold of the fender stay, carried it until it hit the fork, then it stopped.