Joe Dog, did you ever run tires as skinny as mine on relatively fat rims? I"m pretty sure that is the issue. I could run more pressure but that would exceed the manufacturer's recommended maximum for the tire. The flats do look like snake bites, although there is never any puncture through the tire and the potholes that flat the tubes are usually ones that I hit while seated. I also put weight on the bike, up to about 20 pounds and I weigh over 190 lbs. This sucks because I only have maybe 200 miles on the tires and already have six flats.