Early on in my 1,000 mile quest, one of my tires needed to be replaced. I had heard someplace that you could be tires designed for pavement for a mountain bike, and I started poking around.
My good friends at Infinite Cycles recommended that I buy some Continental Traffic Tires. I have been completely happy with these tires.
After installing the tires, I was immediately impressed with the lower rolling resistance, when compared to the knobby bike tires I was used to. The road felt smooth, my downhill speeds increased, and the tires feel very stable cornering. It leads to a much more pleasant experience. They perform well on wet streets as well.
After more then a month of commuting on these tires, we took a vacation to Colorado for some singletrack sans kids. With a very few exceptions, these tires performed as well as my previous knobbys! It did slip more then expected as I rode over smooth branches and rocks, but I was very happy with my experience.
The reviews that I've read indicate that these tires last for years, and I'm looking forward to enjoying them on my commute!
If you are among those of us that commute on a mountain bike, do yourself a favor and buy a pair of these tires. The riding experience is much more enjoyable, and you'll find yourself riding more!