D'Addario H413 XLM Viola Strings

Helicore Viola Single G String — Extra Long Scale, Medium Tension

The Helicore viola G string is a single replacement string designed for full-size and oversized violas measuring 17" and over. Its multi-stranded steel core — D'Addario's signature cable-core construction — combines the strength of steel with the flexibility a bowed string needs for clean articulation. Silver winding over that cable produces a clear, warm tone that sits comfortably in ensemble and solo settings alike. The smaller string diameter gives the bow a quick, responsive feel, while the ball-end fitting makes installation straightforward on standard viola tailpieces.

Engineered in D'Addario's New York production facility, this G string is described by the maker as the most popular viola string for traditional and alternative styles, plus advancing student players. The stranded steel core is built to deliver excellent pitch stability and longevity, so the G holds its tuning through long rehearsals and varied climates. Each string ships in a uniquely-designed sealed pouch that protects against the moisture and contaminants that cause corrosion during storage.

Technical Specifications

• String Type: Single replacement G string
• Instrument: Viola
• Scale Size: Extra Long Scale — fits violas 17" and over
• Tension: Medium
• Core: Multi-stranded steel core
• Winding: Silver wound
• Ending: Ball end
• SKU: H413 XLM
• Country of Manufacture: USA (D'Addario New York facility)

Who It's For

The Helicore Viola Single G String in Extra Long Scale, Medium Tension is the right choice for viola players with 17" or larger instruments who need a responsive, stable replacement G with a clear and warm tone. Advancing students working through traditional repertoire will appreciate the quick bow response and pitch stability that supports clean intonation during long practice sessions. Professional players exploring alternative styles — folk, fiddle crossover, jazz, and contemporary chamber music — will find the stranded steel core's flexibility and focused articulation well suited to varied bowing techniques.

The medium tension offers a balanced feel that suits most playing styles without requiring adjustment to bow weight or left-hand pressure. For violists whose instrument falls into the 17"+ range, this Extra Long Scale variant provides the correct string length for proper fit on the tailpiece and accurate tuning at A440. Pair it with the matching Helicore A, D, and C strings to complete a full Extra Long Scale set.