Nylon String Guitar Strings guide
How to Set Up and Use Nylon String Guitar Strings
The bridge knot is the one bit of real technique in fitting a new set — get that right, be patient with the settling period, and the rest looks after itself.
The first time I changed a set of nylon strings on my own guitar, I tied the world's most confident-looking knot, brought it up to pitch, and watched it slip loose an hour later mid-song. Nobody warns you that fitting them properly is a bit of a craft in itself — not hard, just different from a steel-string set. Here's the way I do it now, having got it wrong enough times to get it right.
What You'll Need
- A new set of tie-end (or ball-end, if your bridge takes them) nylon strings
- A tuner — clip-on or app-based both work fine
- A pair of small scissors or wire cutters
- A soft cloth, for wiping the guitar down afterwards
If you haven't chosen a set yet, our buyer's guide will help you pick the right tension and material before you get started here.
How to Fit and Settle a Set of Nylon Strings
- Remove one old string at a time. Loosen it fully, unwind it from the tuning post, and unpick the knot at the bridge. Doing one string at a time keeps a little tension on the neck throughout, rather than letting it all go slack at once.
- Thread the new string through the bridge. Pass it through the tie-block hole, bring the tail back over the top of the string, and loop it under itself two or three times, pulling it snug against the bridge. A loose bridge knot is the single most common reason strings slip out of tune.
- Feed the other end through the tuning post. Leave a little slack, thread it through the hole, and wind it so each turn sits below the last, keeping the wraps neat and close together.
- Bring the string up to pitch gradually. Don't rush it straight to full tension — tune it up in stages, checking as you go, so you can feel if anything is binding at the nut or slipping at the bridge.
- Repeat for all six strings. Trebles first or basses first, it doesn't matter much — just work steadily and don't leave the guitar fully de-strung for longer than necessary.
- Stretch and re-tune, several times. Gently pull each string away from the fretboard a little, then tune again. Do this a few times per string, then leave the guitar and come back to tune it again in an hour, and again the next day.
Why It Won't Hold Pitch Straight Away
This is the bit that catches people out. Nylon stretches far more than steel when it's new, so expect real tuning drift for several days, not minutes. Fluorocarbon trebles tend to settle a touch faster than clear nylon, but neither is instant. If you're hearing your guitar drift flat within an hour of tuning, that's completely normal at this stage — it doesn't mean you've done anything wrong.
Getting the Bridge Knot Right
A weak bridge knot is behind most of the "my new strings keep slipping" frustration I hear about. The string should loop under itself at least twice at the bridge, pulled tight before you bring it to pitch, with the tail sitting flat rather than sticking up or crossing over the main string. If a string keeps working loose at the bridge after a day of settling, it's almost always the knot, not the string.
Common Teething Problems in the First Few Days
| What you notice | Likely cause |
|---|---|
| Tuning drifts flat repeatedly | Completely normal stretching — keep re-tuning |
| One string keeps slipping at the bridge | Loose or poorly tied bridge knot — redo it |
| Buzzing near the nut | String not seated properly in the nut slot |
| New strings sound harsh or thin | Normal for the first day or two — tone settles as they bed in |
If something still feels off after a few days of normal settling, it's worth checking you haven't made one of the more avoidable errors — we've rounded up the most common nylon string mistakes separately.
Looking After Them Once They're Settled
Wipe the strings down with a soft, dry cloth after playing, especially the wound basses, which pick up grime from finger oils and tarnish over time. Keep the guitar somewhere with reasonably stable humidity rather than next to a radiator or in a damp cupboard. Most players get a good few months out of a well-cared-for set before tone or intonation starts to go, and our overview of how nylon strings are built explains why the trebles and basses tend to wear at different rates.
The Bottom Line
Fitting nylon strings isn't difficult once you've done it a couple of times — the knot is the only real technique to learn, and patience with the settling period is the rest. Take it slowly the first time, and if you're still building confidence with the instrument generally, our beginner's guide is a good companion piece to this one.
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