The Marathon Touring tires (Greenguard) are an excellent commuter. I have used these for the last few years and gotten excellent treadwear as well as great puncture protection. The last set on my main commuter gave me about 5,000 miles on the rear tire, and 8000 on the front tire. In that time, I believe I had one flat on the rear from a nail. Rolling resistance on these tires is minimal, and they are a smooth riding tire as well. The touring version of the Marathon Tire is available in many sizes as well. I also run the Marathon Winter plus tires in the winter, and when I switch back to the touring tires in the spring, it feels nimble like a race bike!