Tecnifibre X-One Biphase 12m Set

TECNIFIBRE X-ONE BIPHASE

Tecnifibre X-One Biphase is the brand's flagship multifilament — built from high-end fibres with a Biphase treatment for a plush, powerful, natural-gut-like feel and exceptional tension hold for the category. It stays cloud-like even at higher tensions, which makes it a benchmark for players protecting their arm. It is offered in natural and black.

It is the premium comfort-and-power multifilament — crisper and slightly more spin-friendly than NRG2, more powerful and lively than TGV.

On-Court Performance

Comfort is outstanding. The feel is plush and cushioned on every contact, and it holds that softness even strung tight, which is unusual for a multi.

Power is high. Depth comes with almost no effort, so it suits players who want the string to do some of the work.

The response is crisper than NRG2 — less mushy, with better feedback and a touch more spin, though still well short of a poly.

Durability is the limitation. It outlasts synthetic and natural gut but not a poly, and may fray a little early before settling.

Who Should Use It

• Players with tennis elbow or other arm, wrist or shoulder issues

• Players who want natural-gut comfort and power without the price

• Touch and all-court players who value feel

• Players in stiff, low-powered racquets who want free depth

• Players who found NRG2 too mushy

Who Should Not Use It

• Heavy topspin baseliners who rely on string bite

• Frequent string breakers

• Advanced players who want a controlled, low trajectory

• Players who want the lowest possible power

Hybrid Setups & Performance Adjustments

Power
Already powerful — raise tension, or put a poly in the crosses, if the ball flies long.

Control
String toward the upper tension range, or use a poly in the crosses.

Spin
Put a shaped poly in the mains and X-One Biphase in the crosses.

Comfort
Full bed at moderate tension is one of the most arm-friendly setups available.

Tension Stability
Exceptional for a multifilament — expect a long, gradual softening.

Durability
Hybrid with a poly main if you break the mains quickly.

Technical Specifications

Typology:
Multifilament

Shape:
Round

Composition:
High-end polyamide multifilament with Tecnifibre's Biphase treatment and a PU coating

Available Colours:
Natural / Black

Available Gauges:
1.18 / 1.24 / 1.30 mm