Four practical ranges
| Tension | Typical response | Starting point |
|---|---|---|
| 18–20 kg | soft, high pocketing, easy depth | comfort-oriented or many polyester setups |
| 21–23 kg | balanced power and control | many recreational and club players |
| 24–26 kg | firmer and more direct | fast, clean swings |
| 27–30 kg | very firm specialist range | only after testing and within frame limits |
Material changes the answer
Polyester is typically stiffer and is often installed at a lower tension. Multifilament and natural gut are more elastic and may be used slightly higher. A hybrid can use different tensions for mains and crosses.
Change one variable
Record string model, gauge, tension and playing hours. Adjust by only one or two kilograms at a time; otherwise it is difficult to identify what improved or harmed the setup.
Arm comfort: Very firm polyester is rarely a sensible default for a sore arm. Persistent pain needs professional assessment.
When to restring
Strings lose tension and elasticity even before breaking. Restring when response, comfort or spin drops noticeably, or when deep notches appear.
Compare tension interactively