Wilson Jack Kramer Autograph

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Jack Kramer Forehand

Jack Kramer Forehand

John Albert Kramer was an American tennis player of the 1940s and 1950s. A World No. 1 player for a number of years, and one of the most important people in the establishment of modern men’s “Open”-era … Wikipedia

  • Born: August 1, 1921, Las Vegas, NV
  • Died: September 13, 2009, Los Angeles, CA
  • Height: 6′ 2″ (1.88 m)
  • Weight: 185 lbs (84 kg)
  • Education: Rollins College
Manufacturer
Wilson
Racquet ModelWilson Jack Kramer Autograph
Reference TensionNot Strung
StringNot Strung
Static Data
ASPS, RDC0
ASPS, FlexFour0
Racquet Flex, RDC32
Racquet Flex, FlexFour39
Weight, Gram371.2
Weight, Ounce13.09
Balance, mm329
Balance, Inch12.95
Length, cm68.80
Length, Inch27.09
Head Width8.13
Head Length10.90
Head Area, sq cm448.8
Head Area, sq in69.6
Number of Main Strings18
Number of Cross Strings20
Ratio Cross/Main0.671
Main String Grid6.30
Cross String Grid8.80
Density0.797
Average Cross String Spacing0.440
Average Main String Spacing0.350
Dynamic Data
Dynamic Tension, KP, ERTNot Strung
Dynamic Tension, Lbs/inNot Strung
First Moment, Nm0.943
Polar Moment348
Torsional Stability11
Swing Weight, Gram337
Swing Weight, Ounce11.89
Swing Weight Calculated401.8
Power, RDCNot Strung
Control, RDCNot Strung
Maneuverability, RDC
Not Strung
Power, Calculated401.8
Head Points4.72
Head Weight, Percent47.8
Center of Percussion19.5
Dwell Time, MsNot Strung
Effective StiffnessNot Strung
K, lb/inNot Strung
Recoil Weight145.05
Twist Weight188.63

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