Diadem Tennis Strings
Find Your
String
The Engine of Your Racket
Strings shape everything: power, spin, control, and comfort. Tell us what matters most in your game, and we'll match you to the right Diadem string.
Start the FinderString Finder
Two Questions to Your String
Tell us what you're after and how you play, and we'll match you to the right Diadem string, gauge included.
01 What matters most to you?
02 How would you describe your game?
The Lineup
Nine Strings, One For Every Game
From spin-hungry co-polys to arm-friendly multifilaments, every Diadem string is built with a purpose.
Soft Co-Poly
Solstice Power
Massive spin and pinpoint control in a comfortable co-poly. Diadem's flagship spin string, built for every level.
Soft Co-Poly
Solstice Black
The next generation of Solstice Power: a black pigment for an even softer feel, plus improved tension maintenance.
Firm Co-Poly
Pro X
One of our best-sellers. The firmest, most powerful string in the line, built with pro-player input for an explosive response.
Round Co-Poly
Flash
A round-profile co-poly built to last. The pick for frequent string breakers and hybrids.
Multifilament
Impulse
A soft, gut-like multi with easy power. Arm-friendly comfort for slower swings and tennis elbow.
Premium Multifilament
Dark Matter
A vibration-dampening premium multi with above-average power and real spin potential. Ultra-smooth and arm-friendly.
Monofilament
Evolution
A responsive, comfortable monofilament with easy power. TIA top-rated, and best used as the cross string in a hybrid setup.
Synthetic Gut
SG Ultra
A true entry-level string: incredible feel and durability at a low cost. Great alone or in a hybrid.
Firm Co-Poly
Elite XT
A stiffer, explosive co-poly with elite tension maintenance. For advanced, precise ball-strikers.
Ratings are a general guide to help you compare within the Diadem line. All strings come in multiple gauges; reels available for frequent stringers.
String 101
How to Choose
Three things decide how a string plays: its material, its gauge (thickness), and the tension you string it at.
Type of String
Co-Poly (Polyester): control, spin, and durability with a firmer feel. Best for intermediate-to-advanced players: Solstice Power, Solstice Black, Pro X, Flash.
Multifilament: soft, powerful, gut-like comfort. Best for slower swings, comfort seekers, and arm care: Impulse, Dark Matter.
Monofilament: comfortable, durable and responsive with easy power, used mainly as the cross string in a hybrid: Evolution.
Synthetic Gut: the softest, most classic feel at the friendliest price, and a great true entry-level pick: SG Ultra.
String Thickness
Thinner strings bite the ball for more spin, feel, and power, but wear out faster. Thicker strings last longer and add control.
Not sure? 16L (1.25mm) is the do-everything gauge most players start with.
How Tight to String
Lower tension = more power, more comfort, a livelier string bed.
Higher tension = more control and precision, with a firmer response.
Most players live in the 48–58 lb range. Drop a few pounds for power, add a few for control.
Mix & Match
A hybrid uses one string in the mains and another in the crosses, blending their strengths: the spin and control of a poly with the comfort of a softer string.
Diadem's go-to: Flash in the mains for durability and control, paired with Evolution or Impulse in the crosses for comfort and power.
Gauge Guide
How Thick Should Your String Be?
Gauge is simply the thickness of the string, and the higher the number, the thinner it is. It affects spin, power, control, and durability on every single ball you hit.
- 15L1.35mm Thickest
- 161.30mm Slightly thicker
- 16L1.25mm Most common
- 171.20mm Thinner, more feel
- 181.15mm Very thin, max feel & spin
"L" means "light": a half step between gauges. Gauge availability varies by string, so check the options on each product page.
Gauge & Spin
A thinner string bites into the ball and snaps back faster, and that snap-back is the mechanism behind topspin. Going from a 16 to a 17 is one of the easiest ways to add rotation to your groundstrokes.
Gauge & Arm Comfort
Thinner strings are easier on your arm. They are more elastic and absorb more shock at contact. If you are dealing with tennis elbow or arm fatigue, dropping a gauge is worth trying before anything else.
Still Deciding?
Let's Get You Strung
Match found? Grab your gauge and go. Want a second opinion, a hybrid setup, or professional stringing? Our team is here to help.
DIADEM Sports · Pressure Makes Diamonds
