Tecnifibre Tennis String X-One Biphase - Red - 1.30 - Multifilament

The X-One Biphase string is Tecnifibre's highest-performing multifilament, delivering exceptional playability, durability, and tension integrity. Its built-in wear indicator visible through significant fraying at the impact zone helps players identify when it's time to restring before full breakage.

As the leading global brand in multifilament technology, Tecnifibre manufactures this premium string in France using advanced materials known for power, comfort, and long-lasting performance. X-One Biphase replicates the feel and responsiveness of natural gut while offering superior consistency and strength.

With cutting-edge technologies such as PU 400, Elastyl fibres, H ,C fibres, and the exclusive Biphase pre-stretch process, this string is a worldwide best seller and a top choice for players seeking maximum comfort and explosive power.

• Wear indicator for early restringing
• Outstanding power, comfort, and feel
• Natural-gut-like performance with improved durability
• Made in France
• Not suitable for heavy string breakers

Who is the Tecnifibre X-One Biphase best suited for?

Multifilament strings are the go-to for players who prioritise arm-friendliness, comfort and a soft feel - especially players with tennis elbow, older players and flat-ball hitters. They play closest to natural gut at a fraction of the price.

What does the 1.30 mm (16 gauge) gauge mean?

The 1.30 mm (16 gauge) indicates the string's thickness. This is a thicker gauge, which trades a little feel for extra durability and tension stability.

What tension should I string it at?

The recommended tension range is 53-62 lbs (24-28 kg). Multifilaments and gut hold tension beautifully across a wide range - the higher end still stays comfortable.

How long will this string last?

Expect this string to last most players 20-30 hours of play, or around 1-2 months of regular use. Restring when you notice the stringbed going dead or losing tension.