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Free UK delivery · Free 30-day returns · sportium.co.uk@gmail.com




Every order ships free with tracking. Timings are on our delivery page.
Email us with your order number within 30 days of delivery and we will send a prepaid returns label. Refunds go back to your original payment method.
Tell us the sport, your level and the measurements that matter at sportium.co.uk@gmail.com and we will help you choose.
Luxilon 4G 125 is a professional-grade co-polymer tennis string set engineered for long-lasting tension, explosive power, and enhanced spin for aggressive players.
Engineered as the newest iteration in Luxilon’s co-polymer family, the 4G 125 combines molecular alignment and a unique poly-ether-ether composition to deliver consistent playability across hours of use. Favored on pro tours and chosen by a large percentage of top-ranked players, this string offers a balance of durability, control, and the trademark dynamic feel associated with Luxilon. Each set arrives numbered for traceable quality assurance and resists atmospheric moisture, keeping performance stable in diverse conditions.
The 4G formulation uses polymer chains aligned in a parallel structure to minimize internal slippage and maintain string bed tension. That structural design reduces stretch over time so your string bed stays firmer and more responsive between restringings.
Expect a lively, powerful response with clear ball feedback and increased spin potential. The string’s composition gives a crisp feel on impact while still offering enough elasticity for controlled depth on groundstrokes and serves.
Yes — the 4G 125 is engineered to be impervious to atmospheric moisture, so it performs consistently in humid or dry conditions. That stability reduces playability variation when you move between indoor and outdoor courts.
This string set is aimed at club players, competitive juniors, and touring pros who prioritize tension stability, spin capability, and a powerful stringbed. If you play an aggressive baseline game, serve big, or need a string that holds up under heavy hitting, the 4G 125 is designed to meet those demands without sacrificing control.
Whether you restring weekly or sparingly, the Luxilon 4G 125 offers a dependable, tour-proven option that blends longevity with playability. Each gold-colored set arrives clearly labeled and numbered, giving you traceable quality plus the signature Luxilon feel that many top ATP players prefer.
Q: What gauge is Luxilon 4G 125 and is it durable?
A: Luxilon 4G 125 is a 1.25 mm gauge designed for a balance of durability and playability, offering strong tension maintenance and long life under heavy hitting.
Q: Can I use this string for both singles and doubles competitive play?
A: Yes. Its tension stability and spin-friendly response make it suitable for competitive singles and doubles across different court surfaces.
Delivery: free and tracked to addresses across the UK, with no minimum spend. We email your tracking link as soon as your order is dispatched; timings are on our delivery page.
Returns: 30 days from delivery to return an unused item in its original packaging free of charge, with a prepaid label. This is on top of your 14-day legal right to cancel, and your Consumer Rights Act protections for faulty goods.
Damaged or wrong item? Email us a photo at sportium.co.uk@gmail.com and we will replace or refund it.
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