I'm impressed with how long the CO2 is lasting,so far I reckon between 1500 and 2000miles and not even half worn yet.

I kept it on most of the winter because my commute is on narrow,muddy country lanes where road tyres would have me constantly on the lookout for hazards plus the last thing I want if it snows is to be stuck at work.

Not as stable as a tkc or MT21 on the road but leagues ahead offroad and looking like it will wear about the same.