The official racket for the Korea National Team

With the unique continuous winding SPIRALWIND™ technology, the Spira 21 series has better torsion resistance and much greater strength than regular racquets. The low section AERODYNAMIC structure efficiently reduces air resistance, producing faster swing speed and allowing the transfer of 100% of power from hand to frame.

The Spira 21 uses the unique no-stop screw SPIRAWIND middle shaft technology.  It enhances the anti-torsion by 12%, anti-pressure by 9%, anti-crash by 15%, and anti-fatigue by 35%.  It can attain the stability and anti-torsion that ordinary products cannot reach.  The racket structure of oval AERODYNAMIC shape can reduce air resistance and give greater head speed.  The Spira 21 is light and with the Square Head Shape the sweet spot is increase by 10%.  

AeroDynamic- The elliptically-shaped section can decrease the air resistance, provide higher anti-torque, maximize control and vastly increase the speed of returning hit.

Nano Tec- The NANO TEC technology works by evenly distributing nano-sized particles in the vacant space between carbon fiber bundles, this highly increases the overall stiffness of the carbon composite fibers, and reduces the distortion of the frame.

Spiralwind- By winding continuous strands of carbon composite fiber at arranged angles, the exclusive  SPIRALWIND™ technology processed racquet is stronger, and more stable than a regular racquet,  provides better torsion resistance, accuracy, and full power from swing energy.

Seven Six- The single-pass grommet hole construction creates less friction between strings, this effectively reduces tension loss, while extending string life.

Flex: Extra Stiff
Frame Composition: Ultra H.M. Graphite, E. Titanium, Nano Resin
Shaft Composition: Ultra H.M. Graphite, Nano Resin, 7.0 Shaft
Weight: 3U (85.0-89.9g) / 4U (80.0-84.9g)
Balance Point: Slightly Head Heavy
Grip Size: G4
Bag: Full Size

Model: Spira 21
Shipping Weight: 0.5lbs
Manufactured by: Victor
Made in Taiwan