| 摘要 |
PROBLEM TO BE SOLVED: To provide a racket frame with excellent repulsion performance by improving surface stability when a ball is hit and enlarging a sweet spot area while keeping lightweight. SOLUTION: In the racket frame 2 made of a fiber reinforced resin formed of the laminated body of a fiber reinforced prepreg, or the like, the weight of the racket frame 2 in the state of not spreading a string on a ball hitting surface F is to be >=180 g and <=270 g and an in-plane natural vibration number in the state of not spreading the string is set to be >=340 Hz and <=460 Hz. |
