Steinberger Guitars SST-104 Light El.Guitar Set

They fit an R-trem Hohner, keep in tune, there's a spare e-string and the end wraps seem reinforced(so they're immune to e-string-eating properties of my bridge and copious amounts of bends). BUT they're the first strings I've ever seen that develop actual ugly red rust in places with the most skin contact(and do it quite fast), also less tense than GHS offering, I had to relax the trem spring quite a bit to level the bridge.

I bought a Spirit by Steinberger GT Pro and thought I'd may as well buy an extra set of strings at the same time.
The GT Pro came supplied with a ser of .010's and I've always used .009's. String gauge changes on regular tremolo guitars are a real pain, to say the least! With the GT Pro I'd changed the whole set, adjusted the tremolo tension and stretched the strings ready to play within 5 minutes. Great strings, good tone and long life (I'm normally quite heavy handed and go through strings quickly, but these last a but longer than my regular branded strings on my other guitars!). Well worth getting these than buying a string adapter and using "regular" strings!

Because the double ball system is so rare, there aren't many options out there for us headless guitarists. There are adapters for the head but I haven't converted yet, so for the time being these are the best strings I can get for my Steinberger.
I've also tried the D'Addario double-ball set which I found to be surprisingly bad (and doesn't even fit an R-Trem properly)! These ones are okay, my first 2 sets have rusted a bit fast compared to my usual single-ball strings and the unwound strings felt perhaps too light for their gauge. If your headless can take single ball strings then pick your favourite set of those, don't bother w/ the double-ball ones. Otherwise, these are the best in that category.

Die Steinberger ist meine kompakte Reisegitarre. Alle 20 Jahre (gefühlt) muss man auch hier die Saiten wechseln.
Dank des "Häng mich oben, häng mich unten ein und spann mich ein bischen" Systems ist der Saitenwechsel schnell und wirkungsvoll gemacht.
Schnell ist und bleibt die Gitarre in einer guten Stimmung.
Ein geniales System. Und eine wirklich gute Klampfe!

Ich wünschte meine "Normalo-Gitarren" wären auch so schnell umgerüstet. Saiten und Spezialgitarre nur zu empfehlen.