Precision Bass Strings: Gauges, Fit and Setup Checks
Choose Precision Bass strings by gauge, construction and winding length. Compare verified sets, check through-body fit, and record your setup after a change.
The best strings for Precision Bass are a set that fits your instrument, suits your intended tuning and gives you a sound and feel you enjoy. Start with the exact set already working on your bass, then decide what you want to change. A packet marked “light” or “long scale” is only part of that decision.
Quick answer: For a four-string Precision, compare the full gauge sequence, construction and winding length before buying. D'Addario EXL170 is .045–.100, while Rotosound RS66LD is .045–.105; those are examples, not universal factory specifications. Check through-body compatibility separately. After changing strings, tune and remeasure relief, nut fit, action and intonation before deciding whether anything needs adjustment.
Illustrative photograph by Alberto Bigoni on Unsplash. The comparisons below use manufacturer specifications; they are not listening-test results from this instrument.
In this guide:
Check Scale Length and String Fit
Identify the instrument before the packet
A familiar body shape does not identify every part. A replacement neck, aftermarket bridge, different tuner or through-body stringing route can change what fits. Record the model, string count, intended tuning and bridge arrangement before choosing a replacement set.
Fender specifies a 34-inch (864 mm) scale and .045–.105 strings for the American Professional II Precision Bass. That is a model-specific example. It does not establish the factory gauge of every Fender or Squier Precision, nor tell you what a previous owner installed.
Check the maker's model page or manual. If identifying an unfamiliar conventional fretted bass by measurement, twice the distance from the nut's speaking edge to the centre of fret twelve gives its nominal scale. An intonated saddle sits at a compensated position, so measuring only to that saddle is not the same reference.
Scale length and winding length answer different questions
The instrument's scale describes its vibrating length. String fit also depends on where the ball end anchors and where the full winding finishes. A through-body route adds distance before the saddle without changing the nominal scale of the neck.
D'Addario's bass-length instructions measure winding length from the string's ball-end junction to its taper. They advise measuring from the ball-end seat to the nut and choosing a string whose taper starts beyond the nut. Their stated long-scale taper position is 36⅞ inches; this is D'Addario's product convention, not a universal meaning of “long scale.”
Check the actual set's drawing or specifications, particularly for unusual bridges, short-scale instruments and five-string models. Do not buy a longer set simply because it seems safer: the full winding and taper still need to sit correctly at the nut and tuning post.
| Fit check | What to record | What needs resolving before cutting |
|---|---|---|
| String count and tuning | Four-string E–A–D–G, or your actual arrangement | A five-string pack is not the named four-string set |
| Nominal scale | Model specification or nut-to-fret-twelve measurement doubled | A familiar headstock does not prove scale length |
| Ball-end seat to nut | Measurement along the actual string route | The full winding must reach its intended support points |
| Bridge routing | Top-load or through-body | Maker approval for that route, especially with flats |
| Nut and tuner fit | Slot clearance, tuner hole and winding arrangement | Binding, an unsuitable taper position or a winding too large for the post |
Through-body flatwounds need their own check
La Bella's which-strings-fit guide distinguishes ordinary long-scale flats from through-body versions such as 760FS-TB. Its bass string guide gives ball-to-silk dimensions by string and set family. Use those details rather than assuming that every .045–.105 flatwound packet fits every Precision bridge.
If a string will not seat or its construction conflicts with the bridge route, stop and confirm compatibility. Do not force it through, trim it first and hope, or use the string as a file to enlarge a nut slot. A string maker or technician can use your measurements to resolve the mismatch.
Compare Precision Bass String Gauges
Read all four numbers
A gauge is the string's outside diameter in inches. A .045 string is 0.045 inches thick; 45–100 is shorthand for the thinnest and thickest strings in a set. The two middle strings matter too, so compare the complete sequence printed on the packet.
The following are verified product examples, listed G–D–A–E from thinnest to thickest. They show why “light,” “regular” and “medium” should not be treated as standardized specifications.
| Four-string set | Gauges in inches, G–D–A–E | Construction or distinguishing detail |
|---|---|---|
| D'Addario EXL170 | .045 / .065 / .080 / .100 | XL nickel-wound, long scale |
| Rotosound RS66LD | .045 / .065 / .080 / .105 | Stainless-steel roundwound, long scale |
| D'Addario NYXL45105 | .045 / .065 / .085 / .105 | NYXL nickel-wound, long scale |
| Elixir 14077 | .045 / .065 / .085 / .105 | Nickel-plated steel roundwound with NANOWEB coating |
Sources: D'Addario EXL170, Rotosound RS66LD, D'Addario NYXL45105, and Elixir's gauge table.
For a nickel-wound reference set, EXL170 gives you a clearly documented .045–.100 starting comparison. Check the selected retailer variant before ordering; EXL170, EXL165 and five-string versions are different sets.
Buy on AmazonGauge alone does not give you tension
D'Addario's technical tension guide accounts for string unit weight, scale length and frequency. Outside diameter alone does not provide all those inputs. Core dimensions, winding material and construction can differ between strings with the same printed gauge.
For the same string at the same pitch, a longer speaking length requires greater tension. Lowering the pitch of that same string reduces its tension. Those relationships are useful, but they do not establish that two different brands with matching end gauges will feel identical or need the same setup.
Compare manufacturer data under matching scale and tuning conditions where it is available. Do not combine numbers from unrelated charts into a supposed precise set total. Fretting feel also involves setup, construction and your technique, so a tension figure is a reference rather than a comfort guarantee.
Choose a change you can evaluate
If your current strings feel comfortable, keep their full gauge sequence as your reference. If you want a different texture or attack, compare construction first. If only one string feels unsuitable, record that string's symptom rather than automatically making the entire set heavier.
For lower tunings, ask the maker about appropriate sets and fit for your bass. There is no universal .105 minimum for Drop D and no gauge that guarantees freedom from fret buzz. A thicker string may need a different nut fit; that is a compatibility question to settle before buying, not an instruction to remove material yourself.
Choose Construction and Useful String Options
Roundwounds: compare the surface and the sound you want
Roundwounds have a textured outer winding. Manufacturers describe different alloys and constructions with different tonal aims, but your pickup, technique, amplifier and controls remain part of what you hear. “Rock strings” and “funk strings” are shopping shortcuts rather than requirements.
Rotosound describes RS66LD as stainless-steel roundwounds with a bright character. It is a useful option to compare when you want that textured feel and attack. Its .080 A string also distinguishes it from the .085 A in the two .045–.105 sets listed above.
For another nickel-wound choice, D'Addario offers NYXL45105. Compare its construction, gauge sequence and current cost with the set you already use. Matching end gauges do not ensure matching feel; note how the full sequence and construction differ before deciding whether the extra cost suits your needs.
Ernie Ball's bass-string range distinguishes Regular Slinky Bass 50–105, Hybrid Slinky Bass 45–105 and Super Slinky Bass 45–100. Make sure the packet says bass: a similarly named six-string electric-guitar set is a different product. Check all four gauges and length rather than selecting by packet colour alone.
Flatwounds: choose a surface, not a genre rule
La Bella's Deep Talkin' Bass flats use polished stainless-steel flat windings. A smoother surface is a useful reason to compare them with rounds. It is not a promise of silence, the exact tone of a particular record or a fixed number of years before replacement.
You can play a pick, fingers or slap with either construction. Decide whether the resulting attack, sliding noise and feel suit your music; there is no need to buy another set simply because a genre checklist says you should. Confirm the exact flatwound variant's fit before installation, particularly with through-body bridges.
Half-round or groundwound strings offer another surface construction. Treat them as a separate product choice with their own dimensions and instructions, not as a guaranteed mathematical midpoint between the tension or sound of rounds and flats.
Coated strings: evaluate your own replacement interval
Elixir 14077 is a four-string, long-scale .045–.105 nickel-plated steel set with NANOWEB coating. Coating is worth considering when preserving the string surface and feel is a priority. The useful question is how it performs under your hands and playing conditions.
Keep a date and a short note about why you eventually replace a set. That lets you compare the cost of usable service in your own routine. Replacement intervals depend on playing time, conditions and the sound you want; a fixed schedule may discard a useful set.
Wipe strings with a clean dry cloth after playing and follow the maker's care instructions. Replace a damaged or unreliable string, and investigate persistent tuning or intonation problems before blaming age alone. An older set that still behaves and sounds how you want is not automatically overdue.
For the wider workbench process, the Bass Setup Guide includes the setup order, a printable Fender reference, checklist and blank log. Its purpose here is organizing the checks after your string choice; it does not select a guaranteed best set or provide a tension specification for every string brand.
Check the Setup After Changing Strings
Install and tune before measuring
Use the string maker's cutting and winding instructions for the actual construction and your tuners. Leave the needed winding length, seat the ball correctly, and check the path over the saddle and nut. Do not apply a generic wrap count or cutting rule to every bass string.
Sadowsky's string-change guidance discusses installation and the bridge contact point. If you encounter an unfamiliar round-core string, locking tuner or bridge clamp, read its specific directions before trimming or tightening. The goal is stable seating without damage.
Tune to the pitch you intend to play and repeat until the reading is stable enough to compare. A tuner you already own may be sufficient. If you need a pedal tuner for repeatable checks, the BOSS TU-3 is one existing option; a purchase is not required to follow this checklist.
Remeasure; do not predict a truss-rod turn
Fender's bass setup instructions separate relief, action, pickup height and final intonation. Compare like-for-like measurements with the reference for your instrument. The setup specs lookup can help locate a starting point; confirm its model and measuring method.
For Fender's general bass reference, relief is read at fret eight with the first and last frets held; action is read at fret seventeen with open tuned strings. Do not compare those action values with a different guide's twelfth-fret measurement. Record the fret and endpoints alongside the number.
Changing gauge, construction or tuning is a reason to check, not proof that an adjustment is necessary. A lighter packet does not prescribe less relief, and a heavier one does not prescribe more. Follow the relevant maker's tool, tension and adjustment instructions only if the measured result and playing test support a change.
| Observation after the change | First check | Avoid jumping straight to |
|---|---|---|
| Pitch catches or jumps while tuning | Nut fit, seating and tuner winding | Filing the slot or buying a new tuner |
| Open note rattles but fretted notes are cleaner | String seating and nut-area clearance | A universal truss-rod turn |
| Buzz appears across a range of frets | Relief, action, technique and consistent test conditions | Assuming a heavier set cures it |
| Fretted octave is repeatedly sharp or flat | Stable tuning, pressure and the octave comparison | Adjusting before relief and action are settled |
| One string sounds quieter | Controls, technique and applicable pickup-height check | Raising every pickup immediately |
For detailed diagnosis, use bass fret buzz or the bass intonation procedure. Owners of a P, J or PJ Squier can use the Squier Bass setup guide for the broader hardware checks.
A multi-tool can be convenient when its bit fits the actual fastener. Check that fit first; a near-fitting hex key is not a safe substitute for the correct size, and one tool does not cover every replacement bridge or truss-rod nut.
Keep a String-Change Worksheet
Write down the existing setup before removing a working set. If it is already damaged or unstable, record that limitation rather than treating the readings as a reliable baseline. Use the same tuner, playing position, measuring frets and normal fretting pressure for the follow-up.
| Record | Before | After |
|---|---|---|
| Date, bass model and bridge route | ______ | ______ |
| Set code, full gauges and construction | ______ | ______ |
| Tuning and manufacturer fit reference | ______ | ______ |
| Relief, with held frets and reading fret | ______ | ______ |
| Action per string, with measuring fret | ______ | ______ |
| Nut-area symptoms or tuning jumps | ______ | ______ |
| Octave comparison, string by string | ______ | ______ |
| Familiar line, feel and unwanted noise | ______ | ______ |
| Adjustment made or technician question | ______ | ______ |
Keep observations separate from conclusions. “A string buzzes around frets five to eight” is more useful than “new strings are bad.” If two variables changed together, such as construction and tuning, your notes cannot isolate which caused the difference.
Frequently Asked Questions
What is the standard Precision Bass string gauge?
There is no single specification for every Precision. Fender lists .045–.105 for the American Professional II example above; check your exact model and existing set. Compare all four gauges, construction and fit before changing.
Is D'Addario EXL170 45–100 or 45–105?
EXL170 is .045, .065, .080 and .100. It belongs to the XL Nickel family. Use the exact set code when shopping because other XL sets and five-string versions have different contents.
Does a 34-inch bass need 34-inch strings?
Nominal scale and winding length are different measurements. The string must also cover the route from its ball-end seat to the nut. Follow the manufacturer's winding-length and taper instructions for your bridge and tuners.
Can I string ordinary La Bella flats through the body?
Check the exact set. La Bella specifies through-body variants such as 760FS-TB for that route. Gauge and the phrase long scale alone do not establish compatibility.
Will heavier strings stop fret buzz?
They are not a guaranteed cure. Check seating, nut fit, relief, action and the frets where the noise occurs. A different set may change the response, but diagnosis comes before buying strings or moving hardware.
Do I need a setup after changing bass string gauge?
You need to recheck the setup. Adjust only where the measurements and playing result call for it. Keep the intended tuning stable and settle earlier checks before evaluating final intonation.
Are flatwounds always higher tension than roundwounds?
Do not infer a universal ranking from the surface construction. Compare the maker's data for the exact strings at the same scale and pitch. Matching outside diameters do not establish matching tension or feel.
What bass gauge should I use for Drop D?
Start with your current set, intended feel and bass dimensions, then consult the string maker's tuning and fit guidance. No fixed minimum gauge suits every bass, and thicker strings may introduce nut or tuner-fit problems.
How often should I replace Precision Bass strings?
Replace damaged or unreliable strings and evaluate tone against your preference. Keep a date and symptom record rather than following an invented universal interval. Older strings can remain useful when they still behave as needed.
Can I use flatwounds for funk or a pick?
Yes. Choose the attack, surface feel and sound you want rather than treating genre labels as rules. Test familiar music with consistent amplifier settings and record what you prefer.
Once you have a compatible set, finish the checks and keep your notes. The Bass Setup Guide's printable checklist and log can stay beside the instrument while you work through the full setup sequence.
