02 · Materials

Carbon or fibreglass? 3K, 12K, 18K and 24K explained

Under the print, a padel racket is a sandwich: two faces of fibreglass or carbon around a core of EVA foam, inside a frame. The face material and the core hardness decide how the racket feels when you hit the ball: soft or firm, forgiving or precise, free power or power you have to create yourself. Here is how to choose both.

4 min read

Fibreglass: soft and forgiving

Fibreglass is the most flexible face. The ball sinks in a little and leaves the face easily, even on slow swings, and less vibration reaches your arm. You give up some precision on hard shots.

Good for: beginners, players who value comfort and anyone who does not swing hard. It is also the most affordable face.

Carbon: firmer and more precise

Carbon fibre is stiffer than fibreglass at the same weight. The face bends less, so the ball goes where you aim and a fast swing turns into more power. The feel is firmer, and slow swings get less help from the racket.

Full carbon is the step from fibreglass to carbon: a firmer, more direct feel at a lower price than the woven grades below.

What 3K, 12K, 18K and 24K mean

The K number is the number of carbon filaments in each bundle of the weave, in thousands: 3K means 3,000 filaments. Bigger bundles make a stiffer face, so as the number goes up you get more power at high swing speed and less comfort.

FaceFeelPowerComfortFor
FibreglassSoftBeginners, comfort
Full carbonFirmFirst step to carbon
3K carbonFirm, preciseControl and feel
12K carbonStiffIntermediate to advanced
18K carbonVery stiffAdvanced, hard hitters
24K carbonStiffestAdvanced, fast swings

The K number also changes the look. If you leave part of the face unprinted, you see the weave: small checks on 3K, large ones on 24K.

The EVA core: 15°, 17° or 21°

Between the two faces sits a core of EVA foam. Its hardness changes the feel as much as the face does:

  • 15° soft: more comfort and an easy ball exit, a forgiving feel, a little less control on hard shots.
  • 17° medium: the balance of both, and the right choice if you are unsure.
  • 21° hard: more control and power on hard hits, but you have to swing to get it, and it feels firmer on the arm.

Temperature matters too: EVA gets harder in the cold and softer in the heat. A softer core helps in winter and on cold courts; a harder one keeps control in summer. The core colour, black or white, shows inside the holes, so it is part of your design.

Surface and finish

Matte or gloss is a question of looks: matte is calm and hides fingerprints, gloss makes colours deeper. A rough surface or a 3D relief gives the ball more grip on sliced and topspin shots, so you get more spin. Both cost a little extra.

Our recommendations

  • Starting out: fibreglass or 3K carbon, 15° or 17° EVA.
  • Intermediate: 3K or 12K carbon, 17° EVA.
  • Advanced, you hit hard: 18K or 24K carbon, 17° or 21° EVA, maybe a rough surface.

Then pair it with the right head shape: see round, teardrop or diamond.

Frequently asked questions

Is 24K carbon better than 3K?

Not better, stiffer. 24K gives the most power to players with a fast swing; 3K gives more feel, control and comfort. Most players are better served by 3K or 12K.

Which EVA hardness should I choose?

17° medium if you are unsure. Choose 15° for comfort or if you often play in the cold, 21° if you hit hard and want control.

Is a fibreglass padel racket only for beginners?

No. Many experienced players like its soft feel and easy ball exit, especially in a slower game built on control.