“The ST4 Pro Stupa is Stupaczuk's 2025 frame with the confirmed vitals of a modern attacker: even balance, 365 g, and a scorecard that reads first-strike padel.”
Overall it sits in the top 4% of 1,000 rackets we’ve tested — its power score ranks in the top 6%.
Power
Very High88
Control
High76
Maneuverability
High71
Sweet Spot
Good66
Comfort
Good67
Value
High78
Owner feedback
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Power
Control
Maneuverability
Comfort
Sweet Spot
Value
PRR Score
89PRR Score
Inside the frame
Electra ST4 Pro Stupa Specs
▽
ShapeRound
Head shape affects sweet spot size and balance.
◷
Weight365g
Frame weight (unstrung, without handle wrap).
⊡
BalanceEven
Balance point determines power vs. control trade-off.
◐
Balance point265 mm
Measured from the handle butt — higher = more head-heavy.
Scores from around the web
PadelReference
78/100
Padeful
79/100
Our verdict
The ST4 Pro Stupa is Stupaczuk's 2025 frame with the confirmed vitals of a modern attacker: even balance, 365 g, and a scorecard that reads first-strike padel. Power 88 converts pressure into finished points, control 76 keeps heavy drives inside the lines, and comfort 67 with tolerance 66 tells you the strike is firm and honest about mishits. Beyond weight and balance, the full specification is unconfirmed, so demo before committing. Value 78 reflects the run-out pricing on last season's signature line: for aggressive all-courters, it is a lot of racket for the money.
Prices updated automatically. UK/USA stores show their own price first with the EUR equivalent in brackets for comparison (indicative rate); you pay the store's price and they ship to that region only. Some links are affiliate links — we earn a small commission at no cost to you. PadelProShop prices shown with PRR10 discount (10% off) already applied. Code auto-applied at checkout.NinePadel prices shown in GBP with PRR5 discount (5% off) already applied. Enter the code at checkout — NinePadel's checkout can't auto-apply it via the link. UK/IE price & delivery only.
Full specification
ControlStandard
Shape
Round
Balance
265mm · Even
Weight
365g
Level
Intermediate
Playing style
Versatile
Year
2025
The series story
SIUX Electra
Stupa's hybrid line, from ST2 to ST5
The SIUX Electra is built around a specific kind of game. Franco "Stupa" Stupaczuk plays at full intensity at the net, finishes points overhead, and is never out of a rally through the glass. SIUX designed the Electra to match that: a hybrid shape that sits between a control-first round and a pure power diamond, loading up genuine finishing pace while keeping a face soft enough to play touch padel. That balance is harder to achieve than most brands admit, and the Electra has been one of the few rackets in our database to genuinely hold both ends of it.
We have tracked the line across three generations. The 2023 ST2 Pro scored 85 with us and set the Electra template: fast through the air, composed under pressure, with a face that let you redirect a vibora or place a clean bandeja without needing to think twice. The 2024 ST3 arrived with a stiffer hitting surface and better stability when opponents loaded pace at you; the ST3 Stupa scored 87, with Lite editions widening the family to lighter swing weights for improvers. The current ST5 Pro editions, Fire Red and Shadow Stupa, both score 91, the highest result SIUX has achieved in our database.
Each generation follows the same structure: a Stupa Pro edition at the top, designed for attacking players who want to smash overhead and still play a composed bajada off the back wall, with Lite and Go trims below for players building toward that kind of game. The ST generation number is the real thread through the range, and what the Electra has consistently rewarded is a particular construction of points: build through the glass, close at the net, finish overhead.
Which one should you buy?
Go straight to an Electra ST5 Pro edition if your budget allows. Both the Fire Red and the Shadow Stupa score 91 with us, and there is no meaningful performance difference between the two colourways. This is the most complete version of the Electra we have tested: it finishes points overhead with authority, stays composed under pressure in the back-court, and gives you enough feel at the net to play a proper bandeja when the rally demands placement over pace. If you find ST3 Stupa stock at clearance, a PRR 87 result is hard to argue with at a sharp enough discount. It remains a clean, capable racket and the gap to the ST5 barely registers on court when the price is right.
The Lite and Go editions are not lesser Electras so much as a different racket in character. Less swing weight, a softer overall response, better suited to players still developing consistency than to attacking players looking to load genuine finishing pace. They are honest options at the right price, but if you are after the full Electra experience, a Pro edition is the one to buy.
First-strike padel at a fairer price than the current model: pressure becomes finished points, heavy drives stay inside the lines, and the even balance keeps your hands quick for the power on tap. Being a superseded signature frame, the full spec is unconfirmed — demo before buying — the strike is firm with modest forgiveness, and the newer version exists if you want the current build.
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What level of player is the Electra ST4 Pro Stupa designed for?
The Siux Electra ST4 Pro Stupa is built for Intermediate players, scoring 89/100 overall in PRR's testing.
How much does the Electra ST4 Pro Stupa cost and where can I buy it?
The Siux Electra ST4 Pro Stupa is priced from €121 at PadelProShop. See the price comparison above for the latest deals across every retailer we track.
What shape is the Electra ST4 Pro Stupa and what does that mean on court?
The Siux Electra ST4 Pro Stupa has a round-shaped head, which spreads the sweet spot wider for consistent, forgiving contact — built for control and touch over raw power.
How much does the Electra ST4 Pro Stupa weigh and what's its balance?
The Siux Electra ST4 Pro Stupa weighs 365g with a Even balance.
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