when you see 3K, 12K or 18K on a blade, it means how many carbon filaments are in each bundle (3K ≈ 3.000, 12K ≈ 12.000, 18K ≈ 18,000). It is not “better or worse” on its own: changes how the racket feels when hitting — how much help it gives you in defense, how much power it brings out when you accelerate the blow and how much vibration it transmits.
What does the “K” in carbon mean?
The “K” is the number of filaments (thin threads) per carbon bundle. With more filaments (18K), the fibers are finer and the fabric is denser; with less (3K), the fibers are thicker. This, along with the rubber, number of layers, and frame design, determines the final feel. If you still don't know what types of rubber there are in padel You can see our post where we talk about it.
If you like the technical part: carbon fiber and tows/filaments.
Differences between 3K, 12K and 18K
| Feature | 3K | 12K | 18K |
|---|---|---|---|
| Stiffness/hardness | Drier and more direct blow (if the structure allows it). | Balance between firmness and daily comfort. | Solid response; firmer/demanding feel. |
| Touch | Less “dock”; very clear feedback on impact. | Tolerant: some rebound without loss of control. | Outside the sweet spot, more vibrations are noticeable. |
| ball exit | Very predictable on slow ball; back helps less. | Balanceable: comfortable defense and stable attack. | Explosive when you accelerate (you move quickly and finish the blow). |
| Power | It depends more on your strength and accompanying the blow. | Scale with your arm speed. | Rewards a quick, complete hit. |
| Player profile | Control/precision, balloons and placement. | Multipurpose (from background to network). | Offensive: you like to shoot and volley hard. |
Feelings on the court (defense and attack)
3K: In defense, if you only put the racket, the ball does not “come out” on its own: you have to accompany the blow a little. In return, lobs and drop shots come out very measured. In attack, he offers precision placement.
12K: It helps you back without going long and maintains stability on the volley. If you increase your arm speed, it responds with good power (without losing control).
18K: Back is more demanding if you don't push the ball; in net and auction, when you accelerate (you move the paddle quickly and complete the gesture), you feel clear power and firmness.
Which one to choose according to your level and style?
- If you start: 3K or 12K for more tolerance.
- Multipurpose intermediate: 12K balances defense and attack.
- Do you like to attack: 18K It rewards you if you move the paddle quickly and finish the shot.
- You are looking for comfort: less rigidity (3K/12K), softer rubber and comfortable weight/balance.
To compare options by material, visit carbon fiber blades or explore the complete collection of shovels.
Examples of shovels 3K, 12K and 18K
¿Mmore filaments = better shovel?
No. 18K It usually gives more firmness and power when you accelerate the blow, 12K It is the “easy” middle point and 3K offers control on slow ball. It depends on the material set and how you play.
Comfort, vibrations and injuries
MMore rigidity tends to transmit more vibration to the arm. If you come from discomfort, prioritize 3K/12K, Softer rubber and a weight/balance that doesn't burden your forearm. The sweet spot and shape also influence.
The “K” in carbon is a fine-tuning to find what best fits your current game: more control (3K), balance (12K) or power when accelerating (18K). Try and choose what you enjoy the most.
