Just for info, I ran Marathon Pluses on my Birdy. I didn't like it; it squirmed during cornering unless pumped rock hard. I got several punctures even, from glass pieces that got through at the edge of the blue layer. It was also heavy and quite expensive. In short, I got no joy out of them. Thr final straw was when the back blew a side wall. Never went back. Unfortunately I can't remember what I replaced it with, most probably a Marathon Racer.