Tecnifibre X-One Biphase 1.18 Squash String

Tecnifibre X-One Biphase is a legend in squash strings. It has been used by more world number ones and PSA tour champions than any other string, and it has maintained this dominant position for years not through marketing but through genuinely superior performance that elite players can feel immediately.

The Biphase construction is the key to its extraordinary character: the string uses two distinct fibre types in a single construction an inner core of hard, high-modulus fibres for power and structural stability, surrounded by an outer layer of softer, more elastic fibres for feel and comfort. This dual-phase architecture allows the string to behave simultaneously like a powerful, stable string on hard-driven shots and a sensitive, touch-responsive string on delicate drops and angles a combination that single-fibre constructions cannot replicate.

At 1.18mm, X-One Biphase is a thin squash string that embeds deeply into the ball at contact, producing exceptional feel and bite. The Biphase construction’s durability mechanism compensates for the gauge’s typical vulnerability the hard inner core resists abrasion and tensile stress effectively, extending the lifespan well beyond what a standard monofilament at 1.18mm would achieve.

The playing experience is the best available in squash strings short of natural gut: powerful, precise, supremely comfortable, and with the kind of feedback and touch that makes the game feel more connected and responsive. This is the string for serious competitive players who understand equipment at the highest level and want the absolute best. Sold as a single strung set.