Originally Posted by jpearl
Another factor leading to pucntures are underinflated tires. I have yet to have a puncture on my '07 Langster. I check my tire pressure on a regular basis, once a week, and make sure they're pumped up to 120 psi. To ride them at a lower psi, say, less than 90psi, would put the tubes at the risk of a pinch flat, or "snakebite".
You can check out new tires and tubes, but have the bike shop give a serious look at the wheels. There might be something out of the ordinary that is also causing the flats, like a spoke nipple head poking through the rimstrip (there should be a rimstrip), debris from and earlier flat still in the tire, an exposed wire bead sticking out of the tire, or simply riding around on underinflated tires.
Be sure to purchase a quality floorpump with a gauge so that you can always check the tire pressure as well. Topeak, Specialized, Silca, and Pedros all make quality floor pumps.
+1
I've put a good 1,000 miles on my Langster (2007), not one flat. Check the weld on the rim. Sometimes those open up and pinch the tube. New rim tape would help too. Other than that, make sure the PSI is over 95 at minimum.
Just to note, I go through tires like a mad man... and so far the Continental Gatorskin is the best. Armadillo's are overrated. Heavy and the rubber isn't really that thick.