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.
Level：SUPER Weight : 3U(85~89.9g) String Tension LBS : 3U:H≦30 lbs V≦28 lbs Length : 675 mm Balance：HH○○●○○HL Shaft Stiffness：S○●○○○F Frame Material : Ultra high modulus graphite+Nano Resin+Carbon XT Shaft Material: Ultra high modulus graphite+Nano Resin +7.0 shaft
This racket will be strung with Victor VS-800 string. For string upgrade, please give us a call to place the order over the phone