I went to my local music shop and asked for my classical guitar to be restrung, and he made the 3 low strings steel and the high 3 nylon even though it's a nylon guitar.

Now the neck of my guitar is bent from the tension and I'm worried it will break.

What should I do now? I haven't tried any fix as I can't find one. I will be asking the shop about it in 1 week.

  • 3
    Chances are the low 3 strings are not steel - they're nylon wound with metal, which is how all nylon sets are. If they are indeed steel cored strings, someone's in trouble!!
    – Tim
    Jan 23, 2017 at 21:03
  • 1
    Why would he do such a thing? Jun 4, 2021 at 12:55
  • I agree with @ggcg (below). A guitar shop are unlikely to put half a set of steel strings on by accident, so the neck may be bent for another reason. Any chance you could post a photo of the neck of your guitar? Jun 4, 2021 at 13:25
  • Why was Tim's answer deleted but no other short answer was? None of them "answer" the question.
    – user50691
    Jun 4, 2021 at 19:52
  • I would add that I have heard of classical guitarists putting a thin steel string on the highest e string to get a brighter sound out of this. I researched this for an answer to another question about the same topic and was very surprised to find sets of "classical" strings for sale that included one or two steel strings.
    – user50691
    Jun 4, 2021 at 19:54

4 Answers 4


The bass strings in a classical set are nylon wrapped with a thin metal winding. If the core is steel then that would be very bad for the instrument.

However, if the person at the store put on a true classical set then I doubt the strings alone caused the bending. You can look at the ends of the strings and if you see some type of soft fibers coming out it is a true classical guitar string, if you see a metal core then remove the strings and go to another store for help.

Classical guitars do not have truss rods so they cannot be "fixed" with a simple tweak. Your guitar could have warped from changed in humidity if it was not properly stored.

To straighten a classical neck you would need to go to a luthier who specializes in classical instruments. They may soak the neck, or expose it to extreme humidity to soften it, and clamp it between flat pieces of wood for a while. It could take weeks or longer depending on the severity of the warp.


Do not use steel strings on classical guitars! Remove them or else you may damage the guitar permanently. Classical guitars are intended to be used with nylon strings.

See this answer from another thread : Putting steel strings on a cheap nylon guitar


Short answer, DON'T.

Your guitar is not designed for steel strings, and you are probably damaging it by fitting them to it.


My classical guitar has an adjustable truss rod. Check if yours does. Perhaps a minor adjustment is all that's needed.

  • I've never seen this. What brand is it?
    – user50691
    Jun 4, 2021 at 19:51
  • Still wouldn't, even if it has a truss rod Jun 14, 2021 at 1:09
  • "I've never seen this. What brand is it?" It's a Fender CN240. It has a dual action truss rod, which is kind of weird in a classical, I grant you that. Jun 16, 2021 at 11:48

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