I almost cried when Schwalbe said the Marathon Slick was going away. Couldn't understand that decision. Anyway, they've finally delivered on a replacement. It's a folding or non-folding true slick equipped with their race guard puncture resistance system. Rated up to 95psi.
We run them on trikes and two wheelers with very good results. Available in 26 x 1.35 and 26 x 2.00