Tecnifibre Tennis String X-One Biphase 200M - Natural - 1.24 - Multifilament

The X-One Biphase string is Tecnifibre's highest-performing multifilament, excelling in playability, durability, and tension integrity. Its wear indicator, visible through fraying at the ball impact zone, helps players identify the ideal time to restring before complete breakage.

Tecnifibre, the global leader in multifilament technology, produces this premium string in France using advanced materials engineered for maximum power, comfort, and long-lasting performance. X-One Biphase is widely regarded as the closest string to natural gut delivering its feel and explosiveness without the typical downsides.

With technologies such as PU 400 elasticity, Elastyl fibres, H2C fibres, and the exclusive Biphase pre-stretch process, this string delivers outstanding comfort, dynamic response, and improved longevity. A worldwide best seller, it is ideal for players who demand premium performance and exceptional feel.

• Built-in wear indicator for proactive restringing
• Exceptional comfort, power, and feel
• Strong tension maintenance
• Not suitable for heavy string breakers
• Made in France

Who is the Tecnifibre X-One Biphase 200M 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 1.24 mm (17 gauge) gauge mean?

The 1.24 mm (17 gauge) indicates the string's thickness. This is a medium gauge, balancing feel, spin and durability - a popular choice for all-round play.

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.