My experience with Kenda tires has not been good. I was getting an average of 2 flats every 3 rides. I've switched them out and since then have used several other brands, all with much better results. In fact, my Michelen pro's that came with my new bike have 2 summers and a few thousand miles on them without a single flat. (Note to self: you have just jinxed yourself and your tires are flatting in the garage right now).