3K, 12K, 18K and 24K Carbon in a Beach Tennis Racket: What Changes

In a beach tennis racket, 3K, 12K, 18K and 24K indicate how many thousand carbon filaments make up each strand of the face fabric: 3 thousand, 12 thousand, 18 thousand or 24 thousand. It's not a quality scale, and a higher number doesn't guarantee more power. In this guide to 3K, 12K, 18K and 24K carbon in beach tennis rackets, we explain what the number really changes, the most common myths, and show real catalog examples for each type of face.

What the K means in racket carbon

Carbon fiber is produced as very fine filaments, thinner than a strand of hair. On its own, a single filament is useless. That's why manufacturers bundle thousands of them into a strand, called a "tow." The K comes from "kilo," thousand:

• 3K: 3,000 filaments per strand.
• 6K: 6,000 filaments.
• 12K: 12,000 filaments.
• 18K: 18,000 filaments.
• 24K: 24,000 filaments.

These strands are woven like cloth and applied in layers over the EVA core, bonded with resin. The checkered pattern you see on the face of many rackets is the weave of that fabric. Finer strands (3K) form small squares; thicker strands (12K, 24K) form a larger pattern.

In the beach tennis catalog, 3K is by far the most common: almost half of the rackets with a listed material use 3K carbon on the face. Next come 12K, kevlar, 18K and 24K.

What really changes between 3K, 12K, 18K and 24K

The K number describes the strand, not the whole racket. The final feel depends on several things at once:

• How many layers of fabric the face gets.
• The type of fiber (the carbon's stiffness modulus) and the resin.
• The orientation of the fibers (plain weave, twill, triaxial, unidirectional).
• The EVA core and the thickness of the racket.
• The design of the frame, the heart and the hole pattern.

That said, there is a real trend in the market. Thick-strand fabrics tend to be heavier per layer, meaning they put more fiber in the face. And brands use 12K, 18K and 24K mainly in rackets built for a firmer, more direct response. That's why the general perception (3K more flexible, 24K stiffer) makes sense as a rule of thumb, as long as you remember that construction can reverse that order.

Same racket, different carbon: the test that isolates the face

The best way to see the effect of the carbon is to compare versions of the same model that change only the face. The catalog has two good examples.

Shark Elite 2026: 3K vs. 18K

Ariadna Costa's Elite comes in 3K and 18K carbon with the same weight (320 g), the same 21 mm profile, the same 26 cm balance and the same three-layer Soft Pro EVA core. Since everything else is equal, the difference in feel between the two comes from the face. It's the best way to test the rule of thumb in your hand: 3K more flexible, 18K firmer.

Compass Vulcano 2026: 3K vs. 12K

The Vulcano has the same structure in both versions: 320 to 330 g, 22 mm, Black Soft EVA, medium balance and Sand Paint finish. Only the face fabric changes, from 3K to 12K, which makes it another good pair to compare before you decide.

Note that in both cases the brands kept soft EVA even in the higher carbon version. It's a way of delivering the firmness of the face without giving up all the comfort.

Myths about carbon in beach tennis rackets

"24K is better than 3K"

There's no absolute better. 24K suits those with technique who want a solid hit; 3K suits those who want forgiveness and touch. Several advanced and competitive rackets use 3K, such as the Shark Elite 3K and the Mormaii Flexxa Slim 3K.

"More K means more power"

Power comes from the combination of face, core, weight and the speed of your arm. A stiff face returns the ball with less energy loss when the hit is clean, but soft EVA returns more when the hit is weak or off-center. For many people, a 3K with soft EVA generates more ball speed than a 24K with hard EVA.

"3K carbon is for beginners"

3K is the most used carbon in the entire catalog, from entry-level models to pro-signature rackets. It's a choice of feel, not of level.

"You can tell the K from the face weave"

The visible weave shows the outer layer, which sometimes serves a more aesthetic function. The inner layers may be a different fabric. Trust the spec sheet, not the appearance.

"The stiffer, the more durable"

Stiffness and impact resistance are different things. A very stiff face can crack from a knock on the edge. Durability depends on construction, resin, the frame and how you care for it with heat and impacts.

Terms that appear alongside the K

Besides the number, spec sheets include other terms about the fabric:

• Twill: diagonal weave, as on the Drop Shot Axion Attack and Prime Attack, both 24K Twill.
• Triaxial: fibers in three directions, to distribute stiffness. Example: Mormaii Triax Carbono 24K.
• Unidirectional: all fibers in the same direction, no weave. Example: Drop Shot Explorer 7.0, with raw (RAW) unidirectional carbon, which leaves the face rough.
• Forged: short pressed fibers, with a marbled look. Example: Heroe's Arion 2026, in 18K forged carbon.
• Aluminized or Silver: fabric with a metallic finish. Brands associate it with a firmer response, but there's no public standardized measurement. Example: NOX NG17 18K.
• Textreme: a brand of carbon fabric made of thin, spread tapes, used by Drop Shot on top-end models such as the Conqueror 13 Tech.
• 45-degree fibers: the Fobel Macaw 4.0 orients the 12K diagonally, which the brand says balances stiffness and flexibility.

Kevlar, fiberglass and other materials

Kevlar (aramid)

Kevlar is an aramid fiber, known for its high strength. In beach tennis rackets, brands use it for durability and easy ball exit, often combined with carbon. The Head Extreme uses aramid and carbon; the Kona Maddox Two has one kevlar face and one 12K carbon face. The drawback frequently cited is slightly lower precision than carbon.

Fiberglass

More flexible and cheaper than carbon, fiberglass absorbs impact well and forgives mistakes. It gives up precision and tends to last less under heavy use. It dominates entry-level rackets, such as the Adidas BT 3.0 and the Shark Tour 2025. There are also blends, such as the Zand Z Soft (70% carbon and 30% fiberglass).

Alternative materials

The catalog has experiments beyond carbon and kevlar: the Sexy Bamboo uses a bamboo fiber face, with a feel the brand describes as close to 3K; models with titanium in the face, such as the Kona Bulldog Titanium 3K and the Ama Sport Athena Boreal 3K; and the ZEIQ New Brave 12K, which reinforces the handle with basalt fiber.

Catalog examples by type of face

An interesting detail in the 24K line: the Mormaii Triax and the Drop Shot Prime Attack use Soft EVA, while the Drop Shot Conqueror 13 Tech uses high-density Tech EVA. All three have a 24K face, but the core changes. As a general rule, high-density EVA demands a cleaner hit and transmits more vibration, so the Conqueror tends to ask more of your arm. It's the core, not the K, that makes that difference.

Which carbon to choose for your level

• Just starting or playing for fun: fiberglass or 3K carbon, always with soft EVA. See the rackets for beginners.
• Improving, two or three times a week: 12K carbon with soft EVA is the natural step. The selection of rackets for intermediate players explains when to move up.
• Advanced and competitive: 18K, 24K or kevlar, combined with the core your arm can handle.
• Sensitive arm: 3K or kevlar with soft EVA, regardless of level.

The face material is only one part of the choice. The guide how to choose a beach tennis racket shows how weight, balance, core and thickness figure in. To cross-check spec sheets, use the beach tennis comparison tool, or filter by brand in the Compass racket comparison. And the ranking of the best beach tennis rackets of 2026 gathers the picks by profile. The entire beach tennis catalog lists the face material on each model's spec sheet.

Frequently asked questions