A yellow circular logo with the text "CELLO-STRINGS.com" in bold orange letters. One end of the circle includes a small spiral detail, resembling a cello string.
Square product packaging for Thomastik-Infeld Spirocore strings, featuring a pink background with a decorative spiral design and bold black text at the top. The brand name and origin are in a white box at the bottom left.

Please note, the image may differ from the product description. For instance, the image could display a set while you are ordering a single item.

Thomastik-Infeld Spirocore C String

Thomastik

Price range: $56.45 through $134.85

Spirocore C strings are favored by cellists worldwide for their powerful, focused tone and remarkable longevity. Choose between Chrome for a balanced traditional response, Silver for added warmth and complexity, or Tungsten—the most popular choice—for outstanding clarity, projection, and quick bow response. Each option delivers exceptional stability and dynamic control, whether in solo or orchestral settings.

Available Sizes: 4/4
String Selection: C String

Description

Enduring Power and Depth in Every Register
The Thomastik-Infeld Spirocore C string is renowned for its flexibility, power, and long-lasting performance—available in chrome, silver, or tungsten windings to match your tonal preferences and playing style. With its highly responsive spiral steel core, this string delivers a powerful foundation with exceptional bow clarity and tonal stability, making it ideal for both soloists and ensemble players.

Four Distinct Windings for Tailored Expression
Choose from four winding options to customize your tone:

  • Chrome (S29) – Balanced tone with durability and tuning stability.
  • Silver (S30) – A darker, warmer tone with refined complexity.
  • Tungsten Medium (S33) – Extremely focused, powerful, and clear; widely regarded as the most popular C string in the world.
  • Tungsten Forte (S33 Forte) – Adds even more projection and tension, ideal for players needing greater resistance under the bow.

Whether you’re seeking bold projection, deep warmth, or a versatile string that performs in any acoustic setting, the Spirocore C string delivers with unmatched consistency and quality.

Additional information

Winding Material

Chrome, Tungsten, Tungsten (Forte Gauge), Silver

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