Tecnifibre X-One Biophase 1.24/17 Multifilament Tennis String Reel 200m Set in Natural (Made in France)

If you're serious about your tennis game and want a string that delivers power, comfort, and lasting performance all in one, the Tecnifibre X-One Biphase Multifilament Tennis String Reel is worth a very close look. Engineered and made in France, this 200m reel in natural colour is designed for the discerning player who refuses to compromise on feel or durability. Whether you're a club regular or chasing that next level of performance, this string is built to keep up with your ambitions.

Key Benefits

• Power and playability combined: The X-One Biphase is engineered to deliver genuine power across all three key criteria — playability, durability, and string integrity — so you get more from every rally.
• Superior comfort on impact: Hundreds of microfilaments work together with a liquid polyurethane-impregnated core to absorb vibration, making each shot feel smooth and reducing stress on your arm.
• Excellent tension retention: This string is designed to maintain its playing qualities over time, meaning you won't notice a dramatic drop-off in performance between re-strings.
• Built-in wear indicator: A clever fraying indicator at the ball impact point lets you know when it's time to re-string — before the string breaks completely, so you're never caught off guard mid-match.
• Ideal for lighter rackets: Highly recommended for rackets under 295g, making it a smart pairing for players using modern, manoeuvrable frames.
• Generous 200m reel: With a full reel at your disposal, you can string multiple rackets and keep your whole kit match-ready without constantly restocking.

Product Specifications or Features

• Brand: Tecnifibre
• String name: X-One Biphase
• String type: Multifilament
• Gauge: 17 / 1.24mm
• Reel length: 200 metres
• Colour: Natural
• Main materials: Polyamide, polyurethane, and silicone finish
• Construction: Hundreds of microfilaments with a liquid polyurethane-impregnated core (PU 400 technology)
• Recommended tension: 22 to 25 kg
• Maximum tension: 32 kg
• Country of origin: Made in France
• Official ATP Tour strings: Recognised and used at the elite level of professional tennis
• Not recommended for: Players who frequently break strings at a high rate

Made in France with genuine craftsmanship and decades of multifilament expertise behind it, the Tecnifibre X-One Biphase is a string that rewards players who value feel, comfort, and consistent performance on court. Grab a reel, get your racket strung, and notice the difference from your very first session.