String tension level and string condition.

Like the choice of string, the initial tension level also has a strong influence on the character and playability of your badminton racquet.

Tension is the application of force/pull to the strings by a machine to achieve the desired playability of the string bed. Most modern racquets are strung at 20–27 lbs (9–12,5 kg). The lower the tension, the more trampoline effect the player will experience.

  • a lower tension level provides more power
  • a higher tension level provides more control

Based on the chosen string or string combination, each player has to find out for himself which tension level gives him the best feel for the shot.

A string is subject to natural aging regardless of whether it is used. From the time the string is installed, it will begin to lose tension, often more than 10% within the first 24 hours. After that, the drop of tension slows down significantly, but it continues, even if the racquet is not played at all. This is especially true when a racquet is exposed to major temperature fluctuations or direct sunlight.

With tension, the elasticity also decreases.

As the tension decreases, so does the elasticity - and with it the power, control and shock-damping performance of the strings. Most stringers therefore recommend re-stringing a racquet at the latest when the tension drop reaches approx. 25%.

With the stringster app you can keep an eye on the condition of your strings. For the most accurate results, take the first measurement right after stringing – before you play the racquet for the first time.

Monitor the loss of tension
and elasticity of your strings
over the course of time!

Get your free download: the stringster app checks the condition of your badminton strings by their sound.

When does it make sense to string with pre-stretch?

Pre-stretching originated at a time when racquets were strung with natural gut strings. Due to the short pre-stretching with increased force, the natural fibers of the gut string were able to fit together more firmly and the desired tension was retained for longer.

In the case of modern synthetic strings, however, the effect of pre-stretch is very controversial. Our measurements have so far not been able to confirm that the ordered tension is retained longer thanks to pre-stretch.

The disadvantage, however, remains that the elasticity (“freshness”) of synthetic strings is reduced from the start by pre-stretching.

Tip: If you normally string with 10% pre-stretch, try alternatively to string without pre-stretch – but with 5% higher tension than usual.

Fine tuning string tension level.

After you have found a suitable string or string combination for you and your racquet, you can experiment a little with the string tension level the next time you get you racquet strung.

You are looking for a little more control in your strokes? Then the next time you have to string 0.5–1.0 kg (1.0–2.5 lbs) harder.

You would appreciate a little more power and playing comfort? Then the next time you have to string 0.5–1.0 kg (1.0–2.5 lbs) softer. This improves the trampoline effect and enlarges the sweet spot.