Stainless steel roundwound


40 • 60 • 80 • 100




SM66 strings hybrid gauge Swing Bass 66 5string bass guitar set of string 40 125 gauge bright stainless steel tone roundwound round wound guage medium 40 100

Swing Bass 66 Hybrid | 40-100


810mm – 860mm | 32″ – 34″

This is the roundwound string that James How and John Entwistle perfected into what was to become the industry standard.

The bright, punchy, high-energy sound of Swing Bass 66 strings is a major part of early rock music history and brought the bass player from the back line to the front of the stage.

For the players

Inspired by the penetrating tone of legends such as John Entwistle and Chris Squire, players worldwide have strung up their bass guitars with Swing Bass 66 strings.

The distinctive sound of our roundwound Swing Bass 66 strings have been used by the bass-world’s biggest hitters such as Jaco Pastorius, Geddy LeeBilly Sheehan, Noel Redding, Duff McKagan, and John Paul Jones. The bright red silk ends are hard to miss!

Arni Arnason Bass Player Vaccines Rotosound Strings Artist Bassist British Band

As heard on

The Who | Live at Leeds & Who’s Next

The Jimi Hendrix Experience | Electric Ladyland

Alice Cooper | School’s Out

Guns n’ Roses | Appetite for Destruction

Led Zeppelin | Led Zeppelin III

Rush | Moving Pictures

Queen | A Night At The Opera, A Day at the Races, News of the World, Jazz

David Lee Roth | Eat Em and Smile

Mr Big | Lean Into it

The Jam | In the City

Oasis | What’s the Story, Morning Glory

British quality

Manufactured in the UK to precise tolerances and using only the finest materials, you can rely on Swing Bass 66 strings for consistent tone and performance in every packet.

Every Swing Bass 66 string is still hand made by highly skilled engineers on James How’s original machinery. 

A string for everyone

With so many musicians experimenting with unique gauges and drop tunings it is hardly surprising to know that Swing Bass Custom Box Singles, first introduced in the ’60s, enjoy more popularity now than ever before.

With such a wide range starting from 0.025″ to 0.140″ in increments of 0.005″ there will be a gauge to suit everyone’s custom set.

Tension chart






39.50 lbs



38.68 lbs



43.80 lbs



33.40 lbs

Hear them in action

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