I can't count on one hand how many puncture flats I've had running Armadillos on my two bikes that see the most road action. That's because I've had none in over 10,000 miles now. The 25mm ones are going to need to be replaced soon but it's understandable after 5000 miles. The 1.5" Nimbus Armadillos are nearing 6000 miles and show no signs of needing replacing. Incredible I think. In my experience, they aren't the fastest or most comfortable tire, but they DO NOT flat. I love them