Tennis Racket Stiffness | A Comprehensive Guide

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In tennis, there are numerous equipment features that can have a huge impact on your performance.

And one of these which is often overlooked is the stiffness of your tennis racket.

Racket stiffness, the amount the racket bends upon impact on the ball, plays a crucial role in shaping a player’s performance.

This article delves into the intriguing world of tennis racket stiffness, exploring its effects on power, control, and player comfort.

Let’s do it!

What is Tennis Racket Stiffness?

First, you need to understand what racket stiffness is.

Tennis racket stiffness, often called frame stiffness, refers to the flexibility in a racket’s frame. It significantly impacts a player’s experience on the court affecting many different aspects of the game.

Racket stiffness is measured on a rating system that ranges from 40 to 85, with lower numbers representing more flexible rackets and higher numbers representing stiffer rackets. This is often referred to as the “RA rating”.

However, you’ll find that most tennis rackets have an RA rating between 50 and 70.

Selecting the appropriate stiffness is super important for players looking to optimize their performance.

How is Tennis Racket Stiffness Calculated?

Babolat Racquet Diagnostic Center - tennis racket stiffness
Image Source: AM Stringing

Many companies have developed machines to measure the stiffness of your racket.

The most common machine for measuring racket stiffness is the Babolat Racquet Diagnostic Center.

And recording the stiffness with one of these machines is quite easy.

All you have to do is secure the racket handle and then apply some pressure on the head to cause the frame to flex. The Babolat Racquet Diagnostic Center will then be able to calculate the racket stiffness rating.

This machine can also be used to measure the racket’s weight, balance, and swingweight making it extremely useful.

However, it’s worth noting that the Babolat Racquet Diagnostic Center costs thousands of dollars so it’s unlikely you’ll be buying one of these machines.

That is why I always recommend sticking with trusted tennis racket brands when you’re looking to buy a new racket. This is because the manufacturers of these brands are reliable and will provide accurate racket specs.

Tennis Racket Stiffness Chart





















How Does Tennis Racket Stiffness Affect Performance?

Tennis racket stiffness is a critical factor that significantly influences a player’s performance on the court.

The level of stiffness in a racket can impact various aspects of a player’s game, including power, control, comfort, and feel.

Understanding how different levels of stiffness affect these elements can help players make informed decisions when choosing a racket that aligns with their playing style and preferences.


A common misconception that people have is that more flexible tennis rackets offer more power.

But this is not the case.

This is because the more flexible the frame is, the more energy it absorbs, reducing the amount of power you can exert on the ball.

Whereas stiffer rackets have more power potential. This is because the ball spends less time on the frame, meaning it retains its energy.


Flexible tennis rackets offer more control, whereas stiffer rackets provide less control.

However, it’s important to note that you shouldn’t rely on your racket to help you with controlling the ball.

Control is a skill that is learned through training and performing the correct technique.

It’s also worth noting that higher string tension can help with control, as well as the type of tennis string that you use.


The stiffness of a racket can impact comfort levels by influencing the amount of vibration and shock that is transmitted to the player’s arm upon ball impact.

Rackets with higher stiffness can transmit more shock, which can lead to discomfort over a long period of use. However, rackets with lower stiffness ratings absorb more vibrations, reducing the risk of arm fatigue and injuries.

Players with sensitive arms or a history of arm issues may prefer rackets with lower stiffness for a more comfortable playing experience.


A stiffer racket may offer a crisper feel, while a more flexible racket can provide a more muted and cushioned sensation. The choice of racket stiffness boils down to personal preference and the kind of feedback a player wants to receive from their shots.

My Favorite Flexible Rackets

My Favorite Stiff Rackets

Best Stiff Tennis Rackets


Does a Stiff Racket Cause Tennis Elbow?

While racket stiffness can influence player comfort, research suggests tennis elbow arises from various factors, including technique, grip, and string tension.

Is a Stiff Racket Better for Control or Power?

A stiffer racket enhances power as it doesn’t absorb as much energy when it makes contact with the ball.

What is the Best Racket Stiffness for Beginners?

A more flexible tennis racket is ideal for beginners. Its forgiving nature absorbs shocks, reducing the risk of arm strain. They also provide more control, which helps beginners be more precise.

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