Tecnifibre X-One Biphase (18-1.18mm) Squash String Set

Tecnifibre X-One Biphase (18-1.18mm) Squash String Set

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Ultimate in Playability, Durability, and Comfort... X-One Biphase is Tecnifibre's premium string. It is designed to take playability and durability to a new level by providing ultimate performance of power and feel, while extending string life by 20% and offering increased spin. X-one Biphase joins together H2C (High Heat Capacity) and NRG microfilaments to acquire this high power and dynamic response. X-One benefits from a process (trimerization), which bonds polyurethane to protect against wear and notching while maintaining high comfort and feel. Leading Edge Technology. Just like Tecnifibre's leading string NRG2, the multifilament fibers in X-One Biphase are immersed in polyurethane to provide ultimate shock absorption and optimum comfort. According to Tecnifibre, the X-One Biphase string uses High Heat Capacity (H2C) fibers, which allows the use of a new chemical treatment process called Trimerization. Trimerization increases the compatibility between chemical molecule links through extreme variations in temperature to result in ultimate efficiency and exceptional feel. This new patented process, extends string life by 20% and offers increased spin. Playability similar to natural gut.
  • #1 rated string for power by the USRSA.
  • #1 rated by the USRSA for comfort.
  • Used by Novak Djokovic.


  • Diameter: 18g (1.18mm)
  • Length: 32 feet (9.70 meters)
  • Colors: Natural, Red
  • Multifilament Technology: Elastyl(TM) Fibre, PU 400 inside+H2C, Biphase process.
  • Item #: 06GXON118
Weight 0.10 lbs
Dimensions 1 × 1 × 1 in

Natural, Red