What solutions are there for a tyre that won't stay seated?
I have had this problem with two different Schwalbe tires now. On both of these tires one of the bead cables/wires seem to have become undone. Not sure how to describe it. If each of the two beads is made up of several wires wound around each other, then on both tires one of these individual wires was poking out of the bead. It was very easy to spot because on both tires it was sticking out several inches just on the inside of the bead. No apparent length wise gash. Rather, it seemed to me as if one of wires had become unwound and migrated over time, I assume, as either a wire individually, or the whole set of wires, resulting in one wire being located parallel to the other wires but outside the tire proper.  Both wires were on the inside of the tire. Sent a picture to Schwalbe and received replacement.