I got my current commuter bike last October. True to earlier comments, the OEM tires were quite flat prone. After a month, I took the OEM tires off and put on a pair of Continental Contact tires. I usually do somewhere around 400 miles per month, and haven't had a flat since. In addition to commuting duties, I take this bike out with my son when he wants to ride the dirt paths at our nearby wildlife refuge or lake. The 26x1.75 Conti Contacts seem to be Jack-of-all-trades tires. They are also the tires that Surly puts on their Long Haul Trucker. A friend of mine has an LHT, and has had success with the Conti Contact tires as well.