HEAD Sonic Pro ™ 17G Black Tennis Strings

The HEAD Sonic Pro 17G (1.25 mm) in Black is a high-value, arm-friendly co-polyester monofilament designed for intermediate, advanced, and club-level players seeking control, durability, and a forgiving hitting feel. Constructed from a uniquely refined co-polymer polyester with a soft molecular structure, it delivers significantly more pop, ball pocketing, and vibration dampening than standard tour polyesters.

The 17 Gauge (1.25 mm) thickness yields higher string elasticity, enhanced touch, and a slightly livelier launch off the string bed compared to the thicker 16G option.

Performance Profile

1. Arm Comfort & Vibration Isolation (8.5/10): Superior for a monofilament. Its soft molecular co-polymer construction cushions off-center strikes, reducing harsh shock transferred to the elbow and shoulder.
2. Control & Predictability (9.0/10): High. Delivers a stable, reliable string bed response that allows hard hitters to swing out fully without spraying the ball long.
3. Power & Depth (8.0/10): Lively for a co-poly. Provides easier depth and pop on medium-to-full swings compared to traditional dead control strings like Luxilon Alu Power.
4. Durability & Notch Resistance (9.0/10): Excellent. The smooth round outer surface resists friction wear and notch formation, ensuring high longevity on the court.

Key Technologies

1. Soft Molecular Co-Polymer Formula: Refined polyester formulation engineered to maintain monofilament control while softening the impact profile.
2. Smooth Round Profile: Reduces string-on-string friction, allowing the main strings to slide smoothly and snap back for consistent playability and reduced surface wear.
3. 17G (1.25 mm) Gauge: Provides enhanced tactile responsiveness, better ball pocketing, and extra pop over thicker 16G variants.

Best Suited For

1. Players Transitioning to Co-Polyester: Intermediate and club players moving from multifilament or synthetic gut who want control and durability without harsh arm feedback.
2. Arm-Conscious Hitters: Competitors wanting a control-oriented polyester that minimizes joint strain during extended hitting sessions.
3. Stealth Cosmetic Matching: The solid Black finish provides a classic, understated look that pairs cleanly with HEAD Speed, Radical, Extreme, Boom, or Prestige frames.

Specifications

• String Model: HEAD Sonic Pro ™.
• String Type: Soft Co-Polyester Monofilament.
• Gauge: 17 Gauge / 1.25 mm.
• Profile / Shape: Smooth Round.
• Color: Black.
• Packaging Options: 40 ft (12.2 m) Single Set / 660 ft (200 m) Reel.
• Primary Benefit: Control, Arm Comfort, & Durable Pop.