What is the best tension for this racket?

It is one of the most common questions in strings and stringing. The most accurate answer, however, is also the least satisfying at first: the ideal tension does not exist.

There is no single number that can be considered correct regardless of the string, the racket, the player and the result they are trying to achieve.

22, 23 or 24 kg are just numbers when they are separated from the context in which that tension is applied.

The useful question is therefore not “what is the best tension?”, but “what tension is most appropriate for this combination of racket, string and player?”

Tension is only one part of the system

A strung racket is a system in which frame and strings continuously interact.

The same tension applied to different strings can produce very different results. Likewise, the same string installed at the same tension in two different rackets can deliver different feel and behaviour.

Then there is the player: technique, swing speed, level, ability to generate spin and personal preferences all change the outcome further.

Tension therefore has to be interpreted together with at least four elements:

• the string being used;
• the racket in which it is installed;
• the player’s technical characteristics;
• the result the player wants to achieve.

The string completely changes the meaning of tension

Not all strings react in the same way when installed at the same tension.

Material, construction, gauge, stiffness, elasticity and tension maintenance all contribute to the response of the stringbed.

A stiff monofilament installed at 23 kg will not necessarily behave like a more elastic string installed at exactly the same tension. Significant differences can exist even within the same string family.

This is why statements such as “I always play at 23 kg” have limited meaning unless we also know which string is being used.

What Racketpedia Lab Tests show us

Racketpedia String Lab Tests use instrumental measurements to characterise the actual behaviour of a string and make comparisons based on measured data.

Parameters such as stiffness, elasticity and tension behaviour help explain why two apparently similar strings can react differently once installed in a racket.

Stiffness is particularly relevant when discussing tension: it describes how strongly the string resists deformation and helps explain why applying the same kilograms to two different strings does not create the same result.

Two 1.25 mm monofilaments are not necessarily equivalent

Consider two strings for which Racketpedia provides free Lab Test sheets: Head Lynx Tour Grey 125 and MSV Focus HEX Ultra Black 125.

String	Type	Gauge	Average static stiffness	Highlighted characteristics
Head Lynx Tour Grey 125	Monofilament	1.25 mm	1.05 kg/mm	Tension maintenance, Spin, Control
MSV Focus HEX Ultra Black 125	Monofilament	1.25 mm	0.92 kg/mm	Tension maintenance, Spin, Ball output

Both are nominally 1.25 mm monofilaments, yet the measurements show different characteristics.

Static stiffness alone already shows why stringing both at 22 kg does not create two equivalent stringbeds.

The applied tension is the same. The string being tensioned is not.

The racket changes the result too

The string does not work in isolation. It is installed in a frame with specific characteristics.

Head size, string pattern, geometry, frame stiffness and string layout all contribute to the response of the complete system.

The same string at the same tension can therefore behave differently in a 98 sq in 18x20 racket and in a 100 sq in 16x19 racket.

Changing racket while keeping string and tension unchanged does not necessarily mean keeping the same setup.

The player is part of the equation

Swing speed, technique, playing level, spin production, frequency of play and individual sensitivity all influence setup choice.

Two players using the same racket and string may legitimately prefer different tensions.

A player who generates high ball speed may need a different response from someone looking for easier depth. A heavy-spin player may also have different requirements from someone who predominantly hits flatter shots.

Tension should adapt to the player, not the player to a number.

Does higher tension mean more control?

One of the most common simplifications is to associate higher tensions automatically with more control and lower tensions with more power.

As a general direction of change this can be useful, but it should not be treated as a universal law. The result depends on the string, racket, starting tension and the way the player strikes the ball.

Increasing tension repeatedly in search of control can eventually produce little more than an excessively stiff stringbed. Lowering tension indiscriminately does not automatically guarantee greater effectiveness, comfort or depth either.

Common mistake 1: copying another player’s tension

“They use 22 kg, so I’ll try 22 kg.”

A tension used by another player only becomes meaningful when the whole setup is known: racket, string, gauge, stringing pattern and player characteristics.

This is even more important when copying a professional. Tour rackets may have specifications, customisation and configurations that differ significantly from retail frames.

Common mistake 2: changing string but automatically keeping the same tension

Changing string while leaving tension unchanged does not preserve the behaviour of the stringbed.

As Racketpedia Lab Tests demonstrate, apparently comparable strings can have different mechanical characteristics. When the string changes, tension should be reconsidered as part of the setup rather than treated as a fixed habit.

Common mistake 3: changing racket and automatically keeping the same setup

A string that worked well at a certain tension in one racket will not necessarily produce the same result in another model.

Head size, string pattern and structural characteristics change the system in which the string has to work. The previous setup can be a reference point, but not automatically the final answer.

Common mistake 4: changing too many variables at once

Changing racket, string, gauge and tension at the same time makes it very difficult to understand which change caused a particular sensation.

For setup optimisation it is more useful to change one variable at a time and observe the result. Tension then becomes a tuning tool rather than a random experiment.

Common mistake 5: forgetting that tension changes over time

The tension set on the machine does not remain unchanged throughout the life of the string.

From the moment the racket leaves the machine, the system begins to evolve. Different strings lose tension and change their response at different rates.

So saying “I play at 23 kg” describes an initial reference condition, not necessarily the state of the stringbed after several hours of play.

If the ideal tension does not exist, where do we start?

Saying that there is no ideal tension does not mean that every tension is equally suitable.

It means replacing the search for a universal number with the search for a reasoned starting point.

Manufacturer guidance, the stringer’s experience, measured string characteristics, the racket and the player’s history can all help define an initial range.

From there, small adjustments can be made while observing how the racket’s behaviour changes.

From the laboratory to the court: Racketpedia and Stringing Cloud

This is where Racketpedia Lab Tests and Stringing Cloud become complementary sources of information.

Racketpedia Lab Tests help us understand how a string is built and how it behaves through instrumental measurements.

Stringing Cloud adds another layer: it allows us to observe how strings are actually used in real stringing services.

• Racketpedia Lab Tests: what are the measured characteristics of the string?
• Stringing Cloud: how is that string actually used and at what tensions?

Putting these two levels together gives the tension data far more meaning.

What can real stringing data tell us?

Stringing Cloud data makes it possible to observe tensions recorded during real stringing services and, with a sufficiently large sample, identify averages, ranges and recurring combinations.

Real-world data does not replace individual choice, but it provides valuable context.

Average tension is not ideal tension

Suppose thousands of stringing jobs with a particular string show an average tension of 22.5 kg.

That does not mean 22.5 kg is the ideal tension for that string.

It means that, within the analysed sample, 22.5 kg is the average of the tensions actually recorded. The same dataset may contain players at 20 kg, 22 kg or 25 kg because rackets, levels, needs and preferences differ.

The average is therefore a statistical reference, not a prescription.

The data becomes even more useful when the racket is included

Looking at the average tension of a string is useful, but the next step is analysing the string–racket combination.

The same string may be used at different tensions depending on the frame in which it is installed.

The question then changes from “At what tension is this string used?” to “At what tension is this string actually used in rackets with these characteristics?”

Laboratory measurements and real-world data tell two parts of the same story

Information	What it helps us understand
Racketpedia Lab Tests	How the string behaves in instrumental measurements
Racket specifications	The system in which the string has to work
Stringing Cloud data	How strings, rackets and tensions are combined in practice
Player feedback	How that setup responds to individual needs

This approach does not turn a database into an absolute answer. It uses data to progressively narrow the range of sensible options.

The right tension is often a range, not a number

For a particular combination of player, racket and string there may be a range in which the setup works well. Within that range, small changes can tune the system in the desired direction.

The starting point can come from stringer experience, Lab Tests, racket characteristics and real Stringing Cloud data. The final value comes from combining those data with the player’s needs and feedback.

From a number to a method

Instead of asking “What is the ideal tension?”, it is more useful to ask “What is the most sensible starting point for this string, in this racket, for this player?”

1. understand the string through measured data;
2. consider the characteristics of the racket;
3. observe how similar configurations are actually used;
4. define an initial tension;
5. collect player feedback;
6. progressively refine the setup.

Do not look for the ideal tension. Look for the ideal setup.

A tension cannot be judged without knowing the string to which it is applied, the racket in which it is installed and the player who will use it.

Racketpedia Lab Tests help describe the string. Stringing Cloud data shows how strings, rackets and tensions are actually combined.

Together they do not provide a magic number. They provide something more useful: the data needed to choose an informed starting point and progressively build the setup that best suits the player.