The Rotosound SM55 is a pressure wound electric bass string set, designed with a unique technique in which the stainless steel winding surface is rolled under pressure after winding. This linea pressure wound process smooths the surface, reduces finger noise and friction, and allows for faster and smoother finger movements. At the same time, the string's mass is retained, resulting in a clear tone with rich mid-range frequencies.
With string gauges ranging from .040 to .100, this long-scale set offers a hybrid gauge that plays smoothly yet delivers ample punch and definition. The SM55 is particularly well-suited for studio recording, fretless basses, and situations where control, tonal purity, and nuance are essential. This original pressure wound string—a 1970s design by James How—remains a unique choice for bassists seeking a subtle and versatile tone.
Specifications:
- Type: Linea pressure wound bass string set for electric bass guitar
- Material: Stainless Steel
- Finish: Pressure-wound (rolled for smooth surface)
- Tension: Hybrid gauge
- String gauges: .040, .060, .080, .100
- Sound character: Clear with boosted mids, less finger noise
- Playing feel: Smooth and responsive with reduced friction
- Length: Long scale
- Suitable for: Studio, fretless basses, quiet passages
- Designed by: James How, 1977
- Created by: Rotosound, United Kingdom
