Those tyres are Schwalbe Hurricanes which are 26 by 2.0 and this pair has seen over 10,000 of mixed use riding and they show no sign of stopping and still look just about as good as new.

They are like a cross tyre for your mtb and do come in a 622 sizing... best suited for hard pack and as such work rather well on the street and roll out extremely well with just a little hum at high speeds.