If I have one complaint about Panaracer Paselas, it's those stupid sipes in the tread. They're not arranged in a way that would make the tread rubber significantly more flexible, but they do make it easy for thorns and small rocks to get lodged in and puncture the tire. Once my current ones wear out, I'm going to Fairweather Travelers or Grand Bois Cerf Greens. Those have a tread pattern as well, but it's not nearly as deep.