Rotosound - 40-100 Swing Bass 66 Long Scale Stainless Steel Roundwound - Hybrid Gauge #SM66

Payment & Security

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Sold out

Rotosound - 40-100 Swing Bass 66 Long Scale Stainless Steel Roundwound - Hybrid Gauge #SM66

Vendor: Rotosound

Type: Strings

SKU: ROT-SM66

$34.75

$34.75 ~~$34.75~~

Shipping calculated at checkout.

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.

Special Order

FREE Shipping

30-Day Returns

FREE Warranty

Canadian Since 1971

Free shipping on most products over $100
Free Returns Within 30 days

Limited time offer

We’re celebrating the launch of our new website. Get $20 off when you spend $1,000 or more. Discount is automatically applied at checkout. Expires on May 10, 2026.

Payment & Security

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

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 Lee, Billy Sheehan, Noel Redding, Duff McKagan, and John Paul Jones. The bright red silk ends are hard to miss!

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


note	Diameter	Tension
G	0.040″	39.50 lbs
D	0.060″	38.68 lbs
A	0.080″	43.80 lbs
E	0.100″	33.40 lbs

https://www.youtube.com/watch?v=r12HDy1zAy0