700x25 if you care, riding at 110 Psi.
I have quite a few miles on them now, and I have to say I like them. They are wearing very well, the traction seems great and, until today no flats.
However, today, on a quick trip into the Evil Labs, I got a staple through the rear tire tire. Ouch. The real irony was that I was actually carrying a floor pump with me because the pump head on it had failed and I was going to mail it into the manufacturer for repair. I was swapping it out with the floor pump I keep at the Labs. So I had a pump, but still had to use CO2 to fill the tire.
Its called Karma, and mine sucks.