Tennis Racquet / 1989
[ Image ] PROTO EX

A medium-thickness tennis racket for top players, developed around the concept of "high resonance theory," which focuses on the resonance relation between the frame and ball when the racket strikes the ball.
The PROTO EX features a design with increasing rigidity towards the tip, which imparts a powerful swing on the ball if it is hit quickly with the tip of the frame face, and served as the model for the rackets that followed.