Spirocore.
A spiral-steel-core orchestra string for cello and double bass, introduced by Thomastik-Infeld in 1957. The defining feature: greater elasticity than conventional strings, less inertia, higher propensity to musical vibration.
A spiral steel
core, since 1957.
The string’s defining feature is the spiral-steel core: “greater elasticity than that of conventional strings, which means less inertia and a higher propensity to musical vibration.”
A further technical development of Thomastik’s Künstler Seil series. Available for cello (chrome, silver, and tungsten windings) and double bass (3/4 and 4/4 sizes).
Spirocore
A spiral steel core.Thomastik-Infeld · the Spirocore brief
Less inertia, more vibration.
Across the range
Two string families.
Cello: chrome, silver, and tungsten windings. Double bass: 3/4 and 4/4 sizes. The double-bass string is the most-played jazz double-bass string in the world.



