ChangeYourStrings

John Mayer's guitar strings: the Silver Sky rig, sourced

Solo · reviewed by the Change Your Strings editorial team ·

John Mayer uses Ernie Ball Silver Slinky (.0105, .0135, .0175, .027, .037, .047), his signature set launched October 2024 after years of custom-gauge experimentation. The set sits intentionally between standard .010 and .011 sets, with Reinforced Plain Strings (RPS) construction for tuning stability. Named for his PRS Silver Sky, the production version of the Strat-style instrument he played on *Sob Rock* and the John Mayer Trio Tour. Mayer in his Ernie Ball announcement: 'I don't play the guitar, I play the strings.'

Who John Mayer is

John Mayer is one of the most commercially successful blues-rock and singer-songwriter artists of the 21st century, solo catalog from Room for Squares (2001) through Sob Rock (2021), the John Mayer Trio (with Pino Palladino and Steve Jordan), and an eight-year touring run with Dead & Company. He's a documented PRS signature artist (Silver Sky, since 2018) and as of October 2024 a documented Ernie Ball signature artist (Silver Slinky).

What he plays

Ernie Ball Silver Slinky (.0105, .0135, .0175, .027, .037, .047) on his PRS Silver Sky, the gauge he says he's been chasing for years. Per his Guitar World launch coverage: "All my career I've been experimenting with custom sets of guitar strings, and for the past few years I've been working closely with Ernie Ball to develop what I consider to be the ultimate set for my playing style."

The gauge math is intentional half-step bumps, every string sits exactly between standard .010 and .011 set sizes. Mayer designed this with tension-consistency across the strings as the goal, not stiffness or brightness specifically. The Reinforced Plain Strings construction adds tuning-stability headroom for the Silver Sky's vintage tremolo, which would otherwise pull plain strings out of tune under sustained vibrato.

Why this fits the rig

The Silver Sky is a 25.5-inch-scale Strat-style guitar with three 635JM single-coil pickups voiced for Mayer's clean-to-edge-of-breakup blues vocabulary. At .0105 high E in E standard, the high strings have just enough tension that vocal-style bends hold pitch under sustained vibrato but not so much tension that they require Bonamassa-level right-hand discipline. The .047 low E is heavier than a stock .010-set's .046, giving him tighter rhythm response on the bass-side of his Trio-era riff vocabulary.

For Strat players chasing his tone: the Silver Slinky on a Silver Sky through a Dumble-style amp (or a Two-Rock / Fuchs Dumble clone) is the closest off-the-shelf match to his rig you can buy. Picking attack and timing, the things that don't go on a gear list, are the rest of the formula.

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