Tecnifibre X-One Biphase 17g Red Tennis String

Tecnifibre X-One Biphase 17g Red Tennis String — 1.25mm

The benchmark multifilament. The Tecnifibre X-One Biphase 17g Red is widely regarded as one of the finest multifilament strings ever made — delivering an exceptional combination of playability, durability, and feel that has made it a favorite among club players, recreational players, and anyone seeking a premium arm-friendly alternative to polyester.

The X-One Biphase’s unique biphase construction blends two types of fibers to optimize both comfort and performance — producing a lively, responsive feel at impact with excellent power and touch. It excels across all three key criteria: playability, durability, and string integrity — outperforming most strings in its class on every measure.

A standout feature is the built-in wear indicator: significant fraying at the ball’s impact point signals that it’s time to restring — before the string breaks completely. A smart, practical feature that helps players stay ahead of unexpected breakage.

• Gauge: 17g / 1.25mm
• Type: Multifilament (biphase construction)
• Color: Red
• Performance: Playability, durability, and string integrity
• Wear indicator: Fraying at impact point signals time to restring
• Available as: 1/2 Set ($11.48), Full Set ($22.95)
• Brand: Tecnifibre
• Ideal for: Club, recreational, and arm-conscious players seeking premium multifilament performance