Rubber hardness changes how easily the sponge compresses, how direct the ball feels and how much physical input is needed to access the rubber's performance. But a hardness number is not universal: 40° on one manufacturer's scale cannot automatically be compared with 40° from another.
What Does Sponge Hardness Actually Change?
The sponge sits between the topsheet and blade. On impact it compresses and rebounds, so its firmness affects the complete rubber response. Pore structure, topsheet elasticity, thickness, internal tension and the blade underneath matter too.
Soft & Forgiving
Easier to compress with modest impact. Often lively and accessible with compact strokes.
Medium & Balanced
A versatile middle ground combining accessible engagement with useful stability.
Hard & Direct
Usually needs more acceleration but can feel stable and precise under stronger impact.
Soft vs Medium vs Hard
| Soft | Medium | Hard | |
|---|---|---|---|
| Activation | Easier | Moderate | More physical input |
| Typical feel | Forgiving, elastic | Balanced | Direct, stable |
| Common fit | Developing players, compact strokes, many backhands | Broad club use | Powerful strokes, advanced forehands |
These are tendencies, not rules. A hard porous tensor and a hard tacky Chinese rubber can feel very different.
Why Hardness Numbers Are Confusing
Manufacturers do not all use one identical measurement system. Different scales and testing methods mean the printed number is most useful within the same brand or rubber family. Do not use a simplistic conversion between Chinese-style hardness labels and European/Japanese degree ratings.
Real Examples From the TT Hub Range
SANWEI Target Europe Soft
Current TT Hub data lists a 37° soft cake sponge and ALL+ / OFF− profile.
View rubber →
STIGA DNA Platinum M/H
A same-family comparison: M is 47.5° and H is 50°. H gives the firmer response.
View rubber →
DHS Hurricane 3
The current range includes H38, H39, H40 and H41. These belong in the DHS/Hurricane context, not STIGA's scale.
View rubber →Should Beginners Use Soft Rubber?
Often, a softer or controlled medium sponge makes sense because it is easier to activate without a huge swing. But “beginner = soft” is too simplistic: overall speed and topsheet behaviour matter. Prioritise predictable response and control.
Is Hard Rubber Faster?
Not automatically. Hard sponge can offer greater power potential when compressed by a strong stroke, but may feel slower or more linear at low impact. Softer sponge can feel livelier with compact strokes because it compresses more readily.
Does Harder Rubber Produce More Spin?
Not automatically. A harder setup can support powerful brushing under heavy acceleration, but if it is too hard for the player to engage, a softer rubber may produce more usable spin. Topsheet grip, tackiness, blade flex and technique matter too.
Forehand vs Backhand Hardness
Many players use a firmer forehand because the forehand swing can generate more acceleration. A shorter backhand motion can benefit from a slightly softer, easier-activating sponge. This is a common principle, not a rule.
Hardness and Playing Style
| Style | Starting direction | Why |
|---|---|---|
| Developing / controlled | Soft–medium | Easier engagement |
| Topspin / looping | Medium–hard | Balance dwell and stability |
| Fast attack / counter | Medium–hard | Directness at higher impact |
| Compact backhand | Soft–medium | Easier activation |
| Power forehand | Medium-hard–hard | Rewards stronger input |
Hardness and Your Blade
A stiff, fast carbon blade paired with a hard rubber can create a very direct, demanding setup. A flexible or controlled blade may make the same rubber more manageable. Think about the complete racket: blade speed and stiffness, topsheet, sponge hardness, thickness and technique. Choosing everything together? Use the Custom Bat Finder.
Hardness vs Sponge Thickness
Hardness describes firmness; thickness describes how much sponge is present. They are different variables. A thick soft sponge and thick hard sponge can behave very differently.
Chinese-Style vs European-Style Sponge Feel
Traditional Chinese-style attacking rubbers often combine tacky topsheets with firmer, more linear sponges. Many European/Japanese-style tensioned rubbers use more elastic sponge systems and greater built-in rebound. The word “hard” can therefore describe different playing sensations.
Read our European vs Chinese Rubber Guide and DHS Hurricane 3 Guide.
Common Hardness Mistakes
Harder = better
Only if your technique can exploit it.
Cross-brand number comparisons
A degree is not a universal conversion.
Ignoring the blade
The same rubber changes with the blade underneath.
Copying professionals
Elite acceleration and timing change equipment demands.
Matching both sides by default
FH and BH mechanics can need different feel.
Changing too often
Adaptation matters when judging equipment.
Not sure which hardness suits you?
The TT Hub Rubber Finder matches your level, style, side, priorities and preferred feel to suitable options.
Try the Rubber Finder →Frequently Asked Questions
What hardness should a beginner use?
A controlled soft-to-medium feel is often sensible, but overall speed and predictability matter more than hardness alone.
Is hard rubber better for forehand?
It can suit a strong forehand, but it is not universally better.
Should my backhand be softer?
Many players prefer this for easier activation, but strong backhands may prefer firmer options.
Is 40° always harder than 37°?
Within the same manufacturer and scale, generally yes. Across unrelated systems, do not assume direct comparability.
Final Takeaway
Choose sponge hardness by asking how much acceleration you produce and what response helps your strokes, not by chasing the highest number. Softer rubbers are generally easier to engage, medium rubbers provide balance, and harder rubbers can reward stronger technique with stability and power potential.
For the bigger picture, read our Complete Guide to Choosing Table Tennis Rubber or browse all table tennis rubbers.
Want to compare your options? Use our compare rubber hardness, speed, spin and control to check key characteristics side by side before choosing.