Siux Electra ST4 Pro 2025 Padel Racket (Franco Stupaczuk)

The Siux Electra ST4 Pro is Franco Stupaczuk's 2025 signature frame, and it is on our wall as run-out stock because the 2026 Electra has replaced it in Siux's catalogue. Nothing about the racket got worse in the meantime. Siux say it was named best hybrid power racket at the Testea Padel Awards; the independent scores below are why we kept stocking it rather than clearing it.

How it actually plays. Padelful rates it 8.6/10 (May 2025): power and manoeuvrability 8.9, control 8.8, sweet spot 8.6 and rebound 8, and describes a stable, responsive frame that is quick at the net, with a strong smash and a sweet spot that still gives decent power off centre. Padelguru, which summarises published reviews rather than playing the racket, also lands at 8.6, with offence 9 its best mark and defence 7.8 its lowest; it adds that the racket is physically demanding over a long session and not forgiving enough for intermediate players. It is a racket for an aggressive all-court player with solid mechanics, and it is not the comfortable option.

A correction. We previously listed this face as 12K carbon. Siux's own 2025 press release and every retailer we checked say 15K carbon over a 3K tubular frame, so that is what we list. Siux do not publish a numeric hardness figure for the core; it is described as a medium-hard black EVA.

What the ST4 changed over the ST3. A new bridge design for manoeuvrability, lateral frame reinforcement that Siux say widens the sweet spot, the 15K face, Dual Pro Grip and the Switch Strap. The mould's character — medium-high balance, firm, fast — carried straight over.

Is this the racket for you?

• Yes if you are a high-intermediate or advanced attacker who wants a tour-grade Siux while this run-out stock lasts.
• No if you want forgiveness, or comfort over a long session. The Diablo Elite 6 is the soft, easy Siux; the Babolat Air Veron 2.6 is the comfortable intermediate frame.

Siux's sponsored professionals may compete with frames that differ from the retail model. This is run-out stock; there will not be a restock.

Specifications from the manufacturer and the retailers named, verified 2026-09-17. Manufacturer weights vary by around ±10g. Independent scores are quoted from the sites named and are their opinion, not ours; we have not court-tested this frame ourselves.