Detail 01
3/4 size
Sized for the standard full-size upright bass most players own, despite the fractional name.
Product detailSKU #1274115036319
ThomastikSpirocore 3/4 Size Double Bass Strings 3/4 Size D String
Independent shopping perspective
The Korena take
Single D string for 3/4 double bass, steel core with the Spirocore construction. For upright players replacing one worn string rather than a full set.
Strong match
Who this is for
- Replacing a broken or dead D on an existing Spirocore set
- Upright bassists who pizz hard and need a durable steel core
- Keeping a spare D in the case for gigs
Consider the trade-offs
When to look elsewhere
- Anyone needing a full set — this is one string only
- 4/4 or 1/2 size basses; scale length won't match
- Bass guitar players — this is orchestral upright 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
D string only
One string, not a set. Mixing new with old means the D will sound brighter until it settles.
Detail 03
Spirocore construction
Steel core string, known for long life and strong pizzicato response rather than a warm arco tone.
Detail 04
Steel core
Higher tension feel than gut or synthetic. Takes longer to break in but holds pitch well.
Final check
Know before you order
- 01Confirm your bass is 3/4 size before ordering; string length is not adjustable
- 02One string only — no other strings included
- 03New string will stretch for several days before pitch stabilizes
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Is this a set or one string?
One string — the D only. You'd need to buy the other strings separately if you want a complete set.
02Will this fit my 4/4 bass?
No. This is cut for 3/4 scale. A 4/4 instrument needs longer strings to reach the tuner properly.
03Is this for upright bass or bass guitar?
Upright double bass. Bass guitar takes an entirely different string type and length.
04How long does it take to settle in?
Steel core strings stretch for a few days. Expect to retune frequently at first before pitch holds steady.
