Detail 01
3/4 size
The standard adult upright size, despite the fraction. Measure your string length before assuming.
Product detailSKU #1274115036527
ThomastikSpirocore 3/4 Size Double Bass Strings 3/4 Size Set
Independent shopping perspective
The Korena take
Full four-string set for 3/4 double bass. For upright players restringing a full-size orchestral or jazz bass.
Strong match
Who this is for
- Restringing a 3/4 upright when the current set is dead
- Arco and pizzicato players who want one set for both
- Bassists replacing a mixed, mismatched set with a matched one
Consider the trade-offs
When to look elsewhere
- Electric bass guitar — these are upright strings
- 1/2 or 1/4 size student basses
- Anyone needing just one replacement string
What matters in use
The specifications, translated
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 02
Complete set
All four strings at once, so tension and feel stay consistent from G down to E.
Detail 03
Double bass, not bass guitar
Far longer and heavier than any electric bass string. They will not fit a bass guitar.
Detail 04
Set price
Upright sets cost several times what electric sets do. Budget for it as a once-every-few-years purchase.
Detail 05
Thomastik Spirocore line
Widely used for both bowing and plucking, so you're not committing to one playing style.
Final check
Know before you order
- 01Change one string at a time to keep the bridge and soundpost in place
- 02No rosin, tools, or tailpiece hardware included
- 03Check bridge and nut slots — new strings expose old grooves cut for other gauges
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Will these work on my bass guitar?
No. These are for an acoustic upright double bass. They're far too long and heavy for an electric bass.
02What size bass do I need?
A 3/4 upright, which is the most common adult size. Confirm by measuring your playing string length.
03Can I use these for bowing and pizzicato?
Yes. This set is used for both, so you don't need to choose one style over the other.
04Should I replace all four at once?
Change them one at a time. Removing all four drops tension and can let the bridge or soundpost shift.
