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Tecnifibre X-One Biphase Strings

As the most powerful family in Tecnifibre's lineup, X-One Biphase is perfect for those who want free power.
Sale -25%
Tecnifibre X-One Biphase 16/1.30 String Black
$17.21$22.95*
Labor Day Sale!
Offer Ends 9/14/26

With its gut like feel, this high-end multifilament offers exceptional power, comfort and ball pocketing. Now available in black. Tennis Warehouse Exclusive!

Sale -25%
Tecnifibre X-One Biphase 17/1.24 String Black
$17.21$22.95*
Labor Day Sale!
Offer Ends 9/14/26

With its gut like feel, this high-end multifilament offers exceptional power, comfort, and ball pocketing. Now available in black. Tennis Warehouse Exclusive!

Sale -25%
Tecnifibre X-One Biphase 15L/1.35 String
$17.96$23.95*
Labor Day Sale!
Offer Ends 9/14/26

This thick version of X-One Biphase provides comfort and power seekers with extra durability and control.

Sale -25%
Tecnifibre X-One Biphase 16/1.30 String
$17.96$23.95*

With its gut like feel, this high-end multifilament offers exceptional power, comfort and ball pocketing.

Sale -25%
Tecnifibre X-One Biphase 16/1.30 String Red
$17.96$23.95*

With its gut like feel, this high-end multifilament offers exceptional power, comfort and ball pocketing. Now available in red.

Sale -25%
Tecnifibre X-One Biphase 17/1.24 String
$17.96$23.95*

With its gut like feel, this high-end multifilament offers exceptional power, comfort and ball pocketing. Plays with a slightly livelier feel compared to the 16 gauge version.

Sale -25%
Tecnifibre X-One Biphase 18/1.18 String
$17.96$23.95*
Labor Day Sale!
Offer Ends 9/14/26

An excellent choice for use in racquets with tight string patterns, hybrid applications and for players wanting to maximize the feel and playability of their stringbed.

Sale -25%
Tecnifibre X-One Biphase 18/1.18 String Red
$17.96$23.95*

The thinnest version of this ultra-comfortable and wonderfully crisp multifilament. Offers exceptional feel and spin, with less durability than the 16g and 17g versions.

Sale -25%
Tecnifibre X-One Biphase 17/1.24 String Red
$17.96$23.95*

With its gut like feel, this high-end multifilament offers power, comfort and ball pocketing and a slightly livelier feel than the 16 gauge version. Now in red.

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