Flex is the measure of the racquet’s stiffness; high flex numbers mean a stiff racquet. Low flex is good for absorbing the impact energy, but high flex is good for bounce. Since bounce was assumed the same for all racquets (COR = 0.85 under all benchmark conditions, for all models), and flex was an evaluation criterion, the rankings here give preference to low flex. Expert players generally prefer low flex racquets.
| Category | Flex |
|---|---|
| Average | 67.65 |
| Standard Deviation | 5.52 |
| Stiffest | 80.00 |
| Most Flexible | 52.00 |
| Median | 68.00 |