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Set of strings Thomastik Superflexible (medium) 4/4 for violin Mi-chrome
15A is the Superflexible variant in which all four strings are chrome-wound: E 8, A 10, D 12 and G 13. One metal across the whole range means the timbre has no seam where you cross from string to string — exactly what section players value, since a desk has to blend rather than stand out. The foundation is the line's own steel rope core, which in Thomastik's words "reduces stiffness and improves elasticity" and delivers "excellent purity of open fifths". Medium gauge, 4/4, vibrating length 32.5 cm, total tension 25.7 kp (56.6 lb). Chrome adds what no other metal in the line does: a hard, abrasion-resistant surface under the fingertip.
🏆 SoundsGood — genuine Thomastik-Infeld strings only, made in Vienna.
One Metal Across Four Voices
When E, A, D and G all carry the same chrome winding, neither the attack nor the density of overtones shifts as you cross strings. You hear it in scales and arpeggios that run through all four: the phrase stays homogeneous and the listener cannot pick out the point where the player changed string. For orchestral work that matters more than a striking solo colour — a desk should sound like one instrument, not like four different timbres under one bow.
A Chrome E Instead of Bare Steel Wire
The top string here is not bare steel but a steel rope core under a chrome winding (art. 8, 7.8 kp). The difference shows up on both sides. Under the finger there is a real surface instead of thin slippery wire, so vibrato in high positions stays controllable. Under the bow the attack is denser and steadier, without the metallic ring a bare E tends to add. If you would rather have a rounder, warmer top, the same set exists with an aluminum E — article 15, at the same 25.7 kp total.
The Stability That Brings Players Back to This Set
Thomastik states it directly: "impressive durability and tuning stability make them very dependable all-around strings". For a set of four chrome strings that translates into predictable behaviour in real conditions — the steel core does not stretch with humidity, the chrome winding shrugs off perspiration, and the crimp ball ends do not work loose in the tailpiece. The result is a set you fit and then forget about until it wears out, rather than one you keep returning to with a peg key.
Specifications
| Purpose | Violin string set |
| Line | Superflexible |
| Size | 4/4 (full) |
| Gauge | medium (mittel) |
| Vibrating length | 32.5 cm (12.8") |
| Core | Steel rope core — the same on all four strings |
| Winding | Chrome on all four strings |
| E string | Chrome winding, brass crimp ball end, 7.8 kp (17.2 lb), art. 8 |
| A string | Chrome winding, brass crimp ball end, 6.5 kp (14.3 lb), art. 10 |
| D string | Chrome winding, copper crimp ball end, 5.9 kp (13.0 lb), art. 12 |
| G string | Chrome winding, nickel crimp ball end, 5.5 kp (12.1 lb), art. 13 |
| Total tension | 25.7 kp (56.6 lb) — Thomastik publishes tension in kilograms (kg = kp) and pounds |
| Thomastik article | 15A |
| Included | 4 strings in official Thomastik-Infeld packaging, each marked with its article number |
| Country of Manufacture | Austria, Vienna (Thomastik-Infeld has been developing and producing strings in Vienna since 1919) |
What's Included
The pack holds four strings — E 8, A 10, D 12 and G 13, each in its own Thomastik-Infeld envelope with the article number. It is a complete restringing with nothing to add.
Who It's For
For the section player who needs to blend rather than project a solo colour; for the musician working in hard conditions — outdoor stages, cold halls, constant travel; and for anyone who finds a bare steel E too bright and too slippery under the finger.
Frequently Asked Questions
What exactly is in set 15A?
Four 4/4 strings in medium gauge on a steel rope core, all chrome-wound: E 8 (7.8 kp), A 10 (6.5 kp), D 12 (5.9 kp) and G 13 (5.5 kp), each with a crimp ball end.
How does 15A differ from set 15?
By the first string only: 15A carries the chrome E (art. 8), 15 the aluminum E (art. 9). Both pull 7.8 kp, so the 25.7 kp total is identical — the difference is the character of the top and the fact that 15A is fully unified in winding metal.
What is the total tension and are other gauges available?
25.7 kp (56.6 lb) in medium. Thomastik's official table also listed this set in light (23.1 kp / 50.9 lb, sold by dealers as 15AW) and heavy (27.2 kp / 59.9 lb). The 2026 site publishes medium only for 4/4.
Does the E come with a ball or a loop?
With a ball — a brass crimp ball end that is not removable. Thomastik does not publish a loop-end E for the Superflexible violin line, so the set suits a tailpiece with ball-end slots or a fine tuner made for ball ends.
Can I swap the G in this set for a silver one?
Yes. The line includes a silver-wound G — article 14 at the same 5.5 kp, so the swap does not change the load on the instrument. It is the simplest way to darken the bottom while keeping the rest of the set in chrome.
Are these genuine Thomastik strings?
Yes. SoundsGood supplies only genuine Thomastik-Infeld product in official packaging marked with article numbers.
🚚 Shipping and Payment
🏆 SoundsGood — full warranty and service support
✅ Quality guarantee — genuine strings only
🏪 Pickup — Kyiv, free
🚚 Nova Poshta / Ukrposhta / Meest — 1–3 days
💳 Installments — PrivatBank, Monobank
🎻 Order the Superflexible 15A set at SoundsGood! ⚡