Siux Electra ST4 Pro Stupa 2025

Introduction

Siux Electra ST4 Pro Stupa 2025 is a teardrop racket with high power and control, aimed at advanced players who want a balanced but demanding feel.

Shape & Balance

The teardrop shape shifts the balance toward the head, which adds power but reduces swing speed. You'll feel the weight at the top when you're at the net.

This shape suits aggressive players who like to finish points. Expect a slightly heavier swing than a round racket, but you get more pop on every shot.

Grip

The handle is standard, but with this much weight, you'll feel the pull on your forearm. Over a three-set match, grip fatigue can set in if you don't have a solid hold.

Make sure you use proper grip pressure to avoid cramping. A tacky overgrip helps keep control when your hands get sweaty.

Power & Control

Power at 8.9 is clearly high—this racket can produce hard shots without much extra effort. You'll notice it on smashes and fast drives. The control at 8.8 is also strong, so you can aim your shots with confidence.

This balance is rare; usually you sacrifice one for the other. Here, the teardrop shape and firm core let you attack while keeping the ball where you want it. But it's not forgiving—your timing has to be right to get both.

Comfort & Speed

Maneuverability is rated 8.9, which is impressive for a racket this heavy. It moves faster than you'd expect, helping in quick exchanges at the net.

Comfort is mixed. The feel is medium-hard, so impact can be sharp on mishits. If you're sensitive to vibration, this might not be your friend. But for players with good technique, it feels solid and responsive.

Materials & Durability

The frame is carbon fiber, which offers stiffness and durability. The faces use 15K carbon, a higher weave density that gives a firm, consistent response. The EVA Hard core adds rigidity and makes the racket last.

Expect this to hold up well against regular play. The materials are top-tier, but they don't add any extra flex—so it's durable but uncompromising.

Analysis

This racket hits a sweet spot between power and control. The scores—8.9 power and 8.8 control—are both high, so you get a solid wall on offense without losing placement on defense. In practice, that means you can fire flat smashes and still drop in soft angles at the net.

With a medium-hard feel and a high rebound of 8.0, it responds quickly off the face. You won't get massive sponginess, but the ball leaves with good speed. That suits players who generate their own pace rather than relying on the racket to do the work.

The sweet spot is forgiving at 8.6, which helps on off-center hits. But the weight—up to 375 grams—makes it a handful. Lighter players or those with slower swings will find it hard to maneuver consistently through a long match.

Beginners should stay away. This racket demands solid technique and physical fitness. If you're still developing your stroke, the weight and stiffness will punish errors rather than forgive them.

Players who prefer a soft, arm-friendly feel might also struggle. The EVA Hard core gives you feedback, but it's not plush. If you have elbow issues, this is not your first pick.