+1 for wire beaded Kojaks (I carry a folding one as a spare). I am astounded at the difference these have made in weight and speed on my Brompton.

I had been running with Marathon Plus previously, terrified of punctures but the Kojaks have proved themselves to me. The wire beaded ones are also great value.

All that said, probably not so suitable for anything other than smoother surfaces. Ideal for me commuting every day across the city.

Regards

Jerry