Table of Contents
Introduction
Franco Stupaczuk's Background
The Electra Line in Short
Siux Electra ST4 2025: The Character
Siux Electra ST5 2026: The Evolution
15K versus 12K Carbon: What Does it Mean on the Court?
What has REALLY Changed from ST4 to ST5?
Playing Feel in Practice
For Which Type of Player?
Star Rating per Category
Conclusion
Introduction
The Siux Electra line is known as one of the most balanced competition lines in padel. No extreme power-only rackets and no pure control models, but a combination of both. With the Siux Electra ST4 2025, Siux introduced a firm and direct racket for players who like to take the initiative. In 2026, the Siux Electra ST5 2026 follows, not a radical change, but a clear refinement in playing feel, balance, and consistency.
Franco Stupaczuk's Background
The Electra rackets have been developed in collaboration with Franco Stupaczuk, a player known for his intensity, speed, and explosive play. Stupaczuk combines aggression at the net with strong defense and quick transitions. Precisely this all-round character forms the basis of the Electra line. These rackets are built for players who want to vary, set the pace, and still maintain control in difficult rallies.
The Electra Line in Short
Both the ST4 and ST5 have a hybrid shape and a clear competition focus. They feel solid, stable, and inspire great confidence at high ball speeds. The Electra line is intended for advanced and competitive players looking for a racket that grows with their game, without becoming too technical or too demanding.
Siux Electra ST4 2025: The Character
The Siux Electra ST4 2025 feels firm and direct from the first contact. This is mainly due to the use of 15K carbon in the face combined with a hard EVA core. The ball leaves the racket quickly and sharply, providing a lot of punch on volleys, bandejas, and attacking shots.
This is a racket that rewards players who actively hit through the ball. The feel is compact and precise, giving you a lot of confidence in aggressive net play and accelerations. At the same time, the ST4 requires timing and technique, as it is less forgiving on off-center shots.
Siux Electra ST5 2026: The Evolution
The Siux Electra ST5 2026 stays true to the Electra DNA but feels distinctly different. By switching to 12K carbon and an adjusted balance, the ST5 plays calmer and more consistently. The contact moment feels slightly longer, providing more control without making the racket soft.
In fast rallies, you particularly notice that the ST5 is easier to maneuver. It gets behind the ball quicker and offers more margin on defensive shots, while still providing enough power at the net to finish points.
15K versus 12K Carbon: What Does it Mean on the Court?
The difference between 15K and 12K carbon is crucial in this comparison. 15K carbon consists of coarser fiber bundles, which makes the racket face stiffer. This provides a direct and explosive feel but also requires more precision from the player. That's exactly what you notice with the Siux Electra ST4 2025.
12K carbon is more finely woven and flexes minimally more on impact. This keeps the ball on the face slightly longer, resulting in more control, a larger sweet spot, and more consistent ball output. This explains the smoother and more forgiving feel of the Siux Electra ST5 2026.
In short: the ST4 2025 is harder and more explosive, the ST5 2026 is more controlled and consistent.
What has REALLY Changed from ST4 to ST5?
The biggest change is not in pure power, but in playability. The ST5 has a better balance, a more pleasant sweet spot, and more calmness in play. The ST4 remains slightly more aggressive and direct, while the ST5 offers more margin without compromising on competition level.
Playing Feel in Practice
In defense, the ST5 feels easier and more stable, especially on difficult balls low to the ground or under pressure. The ST4 demands more timing here but gives a tighter feel on good contact.
In attack, the ST4 is clearly more raw and explosive, while the ST5 offers more control at high speed. Both rackets score highly on spin and variation thanks to their rough finish and stable frame construction.
For Which Type of Player?
The Siux Electra ST4 2025 is best suited for players who like a firm, direct racket and enjoy taking the initiative at the net.
The Siux Electra ST5 2026 is ideal for players looking for a modern all-rounder with more control, consistency, and playing comfort, without losing the competitive feel.
Star Rating per Category
| Category | ST4 2025 | ST5 2026 |
|---|---|---|
| Control | ★★★★☆ | ★★★★★ |
| Power | ★★★★★ | ★★★★☆ |
| Maneuverability | ★★★★☆ | ★★★★★ |
| Sweet spot | ★★★★☆ | ★★★★★ |
| Spin | ★★★★☆ | ★★★★☆ |
| Defense | ★★★★☆ | ★★★★★ |
| Net play & volleys | ★★★★★ | ★★★★☆ |
| Comfort | ★★★★☆ | ★★★★☆ |
Conclusion
The Siux Electra ST4 2025 is the racket for players who love a direct, explosive, and aggressive game. It rewards initiative and speed but also requires technique.
The Siux Electra ST5 2026 is the logical evolution for players who want the same performance but with more control, calmness, and consistency in their game.
Neither is objectively better. They are designed for slightly different types of players within the same top segment. The choice ultimately depends on how you want to play the game.