My commute home was bad... after getting off work at 1pm I decide to go to Central Park and see how it is, since i've never ridden it before, I did 1 loop, and decide thats enough and head cross 57 street, to the Westside Bike Path, at the Circle Line I catch a flat. I can see the glass embedded in the rear tire. I'm pissed cause I only have like 587 miles on these Conti Ultra Gatorskins. Since I always carry my metro card, I walk over to 8ave and catch the A train home.

SO my question is what makes Ultra Gaorskins better tires than Nashbar Prima 2 Plus Road Tire since they both have Kevlar in them?