The best Pilates reformer springs are not simply the strongest springs or the springs with the most resistance.
They are the springs that match the reformer, the exercises being performed and the user.
Springs are one of the most important components of Pilates equipment because they determine resistance throughout the carriage movement. They also affect how an exercise feels, how easily resistance can be adjusted and how the equipment performs over time.
And unlike a box or jumpboard, springs are not an optional accessory you can ignore indefinitely.
They are a wear component.
Eventually, they need to be inspected and replaced.
Balanced Body says its Signature Springs are designed specifically for Pilates reformers and emphasizes consistency, durability and safety. Its current standard spring colors range from very light yellow through light blue, medium red and heavy green.
Merrithew likewise recommends replacing reformer springs every two years to maintain performance and safety.
So whether you are replacing worn springs, changing your resistance setup or buying a used reformer that needs new springs, choosing correctly matters.
What Are Pilates Reformer Springs?
Pilates reformer springs are the resistance mechanism that connects the moving carriage to the reformer frame.
When you push or pull the carriage, the springs resist that movement.
The amount and type of spring resistance can be changed by attaching different springs or combinations of springs.
This allows one reformer to provide very different training experiences.
A lighter configuration can be useful for certain arm exercises, mobility work or rehabilitation-oriented movements.
A heavier configuration can provide more resistance for exercises such as footwork.
The exact resistance system varies between manufacturers.
That is why you should never assume that a spring from one brand is interchangeable with a spring from another.
What Makes the Best Pilates Reformer Springs?
The best Pilates reformer springs should provide:
• Consistent resistance
• Appropriate spring tension
• Reliable construction
• Correct compatibility
• Secure attachment hardware
• Appropriate length
• A suitable resistance range
• Manufacturer support
Spring quality matters because resistance needs to remain predictable.
Balanced Body says its Signature Springs are custom-built from nickel-plated carbon steel and have been field-tested for decades.
Merrithew similarly states that its replacement springs are custom crafted from music wire and processed to increase spring life.
This is not an area where generic substitution is necessarily a good idea.
Best Pilates Reformer Springs for Balanced Body Equipment
For Balanced Body reformers, Signature Springs are the manufacturer’s dedicated replacement spring system.
Balanced Body currently identifies four standard resistance levels:
Yellow: Very Light
Blue: Light
Red: Medium
Green: Heavy
However, the colors should not be treated as a universal industry standard.
A red spring from one manufacturer does not necessarily provide exactly the same resistance as a red spring from another.
This is one of the most common mistakes people make when shopping for replacement springs.
Buy Balanced Body Signature Springs if:
• You own a Balanced Body reformer
• You want factory-compatible replacement springs
• You want the manufacturer’s intended resistance system
• You are replacing an aging set
• You want consistent resistance across multiple reformers
The Reformer Shop also carries Signature Springs for Reformers.
Balanced Body Spring Configurations
Balanced Body publishes different standard spring configurations for different reformer models.
For example, the current Allegro 2 standard configuration is:
3 Red + 1 Blue + 1 Yellow
The Studio Reformer uses:
3 Red + 1 Blue + 1 Green
The Clinical Reformer uses:
3 Red + 1 Yellow + 1 Blue + 1 Green
The Rialto uses:
3 Red + 1 Blue + 1 Green
That difference illustrates why you should not order a replacement set based purely on the number of springs.
The correct package depends on the machine.
How Often Should Pilates Reformer Springs Be Replaced?
This is one of the most important maintenance questions.
Merrithew recommends replacing reformer springs every two years to maintain performance and safety.
Balanced Body’s Signature Springs carry a limited warranty of two years or 3,000 hours of use when used with four reformers or fewer. In group settings with five or more reformers, its stated limited warranty is one year.
Those figures should not be interpreted as meaning that every spring will suddenly fail at a particular date.
Usage matters.
A reformer used occasionally at home is exposed to considerably less cycling than equipment used all day in a busy studio.
Nevertheless, springs are wear components.
If you have no idea how old the springs on a used reformer are, replacing them is worth considering.
Signs Your Reformer Springs Need Replacement
Do not rely solely on a calendar.
Watch the springs themselves.
Potential warning signs include:
• Visible corrosion
• Kinks
• Deformation
• Damaged coils
• Uneven spring appearance
• Unusual resistance
• Loss of tension
• Cracks or damage around attachment points
• Fraying or damaged spring covers
• Unknown age
If a spring looks physically compromised, stop using it until the equipment has been appropriately inspected.
A Pilates spring stores mechanical energy.
That means spring failure is not simply an inconvenience.
It can create a safety issue.
Should You Replace All Reformer Springs at Once?
Usually, it makes sense to replace the complete working set when the springs are all of similar age and usage.
This gives you a consistent resistance system.
Replacing one old spring while leaving several much older springs in service can result in an inconsistent set.
There are exceptions.
A single spring may have been damaged accidentally while the others remain relatively new.
In that case, a manufacturer-approved individual replacement may be appropriate.
Merrithew, for example, sells individual reformer springs as well as complete spring packages. Its current 25% spring is sold individually and is intended as a lighter-resistance replacement or addition for compatible traditional configurations.
Should You Buy Individual Springs or a Full Package?
This depends on what you are trying to accomplish.
Buy a full spring package if:
• All your springs are old
• You bought a used reformer with unknown spring history
• The resistance feels inconsistent
• You are rebuilding a reformer
• You want a complete factory configuration
Buy individual springs if:
• Only one spring is damaged
• You want to change a specific resistance level
• You need an additional light or heavy option
• The rest of your spring set is relatively new
For most complete spring replacements, a manufacturer-specific package is the cleaner option.
Best Pilates Reformer Springs for Used Equipment
This is an area where buyers of used Pilates equipment should pay particular attention.
A reformer can look almost new while still having old springs.
The frame and upholstery may have been maintained beautifully while the springs have been sitting under repeated tension for years.
When buying used equipment, ask:
- How old are the springs?
- When were they last replaced?
- Are they original?
- Which manufacturer supplied them?
- Are all springs the correct model?
- Are there any visible defects?
- Has the reformer been used commercially?
If the seller cannot answer these questions, factor replacement springs into your purchase budget.
This is particularly important for commercial equipment.
A reformer used several hours every day can accumulate far more spring cycles than a machine used occasionally in a home.
Can You Use Any Reformer Springs?
No.
This is the most important compatibility rule.
Merrithew explicitly states that its replacement parts are intended for Merrithew/STOTT PILATES equipment and will not fit equipment from other manufacturers.
That is not an unusual restriction.
Different manufacturers can use different:
• Spring lengths
• Resistance ratings
• Attachment systems
• Spring holders
• Hooks
• Configuration requirements
Do not choose a spring simply because it physically appears to fit.
Confirm the manufacturer, model and generation first.
Pilates Spring Resistance Explained
Spring resistance is more complicated than “light versus heavy.”
The actual resistance experienced by the user depends on:
• Spring type
• Number of springs attached
• Exercise position
• Carriage position
• Leverage
• Direction of movement
• Spring characteristics
A combination of two springs is not necessarily equivalent to one spring simply because the labels appear to add together.
That is why resistance charts and manufacturer guidance are useful.
Balanced Body publishes spring resistance information and specifically recommends first-time buyers contact the company to make sure they order the appropriate springs.
What Do Pilates Spring Colors Mean?
There is no universal color standard across every manufacturer.
Within a specific manufacturer’s system, however, colors can identify relative resistance.
Balanced Body’s current standard Signature Spring system uses:
Yellow = Very Light
Blue = Light
Red = Medium
Green = Heavy
This makes spring selection easier when everyone in a studio uses the same equipment.
But do not transfer that color system to another brand without checking.
Which Spring Is Best for Beginners?
There is no universal “beginner spring.”
The appropriate resistance depends on the exercise.
A beginner doing footwork may use a substantially different spring configuration from a beginner performing an arm exercise.
A lighter spring can sometimes make an exercise harder because the user has less assistance or stability.
This is why “lighter equals easier” is not always correct in Pilates.
The best approach is to follow the programming and instruction appropriate to the individual.
Which Reformer Springs Are Best for Rehabilitation?
Lighter resistance options can be useful for certain rehabilitation-oriented exercises.
Merrithew specifically describes its 25% reformer spring as a lighter-resistance option often preferred for arm or rehabilitation exercises.
That does not mean a particular light spring is automatically appropriate for every rehabilitation client.
Clinical programming needs to be individualized.
But if you work in rehabilitation, having an appropriate range of lighter resistance can be important.
Are Heavier Springs Better?
No.
This is another common misunderstanding.
A heavy spring does not automatically provide a better workout.
The appropriate resistance depends on the exercise and the intended movement.
In some exercises, heavier resistance can provide useful support.
In others, it can overwhelm the movement or make proper control difficult.
The goal is not maximum resistance.
The goal is appropriate resistance.
Best Pilates Reformer Springs for Home Users
Home users generally have simpler needs than studios.
If you own a Balanced Body reformer and your springs are due for replacement, use the appropriate Balanced Body spring configuration for your exact model.
If you own a Merrithew reformer, use Merrithew replacement springs matched to your equipment.
Avoid mixing random aftermarket springs unless the manufacturer explicitly confirms compatibility.
For a home reformer used several times a week, maintaining a complete and consistent spring set is more important than buying every available resistance option.
Best Pilates Reformer Springs for Studios
Studios need to think about consistency.
If you have ten reformers, instructors should know what each color and spring combination means.
Standardized manufacturer-specific spring sets make programming easier.
Studio owners should also track:
• Installation date
• Spring age
• Equipment serial number
• Usage
• Visible condition
• Replacement dates
Merrithew specifically uses equipment serial numbers when processing spring purchases and recommends documenting replacement timing.
That is a good maintenance practice for any professional studio.
Spring Covers Matter Too
Spring covers are not merely decorative.
They can protect the springs and reduce direct contact with the metal coils.
Merrithew currently sells individual and set spring covers as replacement parts.
If covers are damaged, missing or badly deteriorated, replace them according to the manufacturer’s guidance.
But do not use a cover to hide a damaged spring.
Inspect the actual spring.
What About Spring Clips?
The spring itself is only part of the system.
Attachment hardware matters too.
Merrithew sells several spring clip types, including carabiner, locking and double-ended swivel clips.
If a clip is damaged or worn, it should not simply be ignored because “the spring is still fine.”
The spring, clip and attachment point work together.
How to Maintain Pilates Reformer Springs
Good spring maintenance starts with inspection.
Check the springs regularly for:
• Corrosion
• Deformation
• Damaged coils
• Unusual gaps
• Attachment damage
• Worn clips
• Damaged covers
Keep the reformer clean and follow the manufacturer’s maintenance instructions.
Do not attempt to modify spring length or resistance yourself.
Do not cut coils.
Do not stretch springs beyond their intended range.
Do not combine incompatible springs simply because they physically attach.
When in doubt, use manufacturer documentation.
Merrithew provides dedicated spring replacement instructions and maintenance resources through its product-care center.
Buying Reformer Springs for an Allegro 2
If you own an Allegro 2, Balanced Body currently specifies a standard configuration of:
3 Red + 1 Blue + 1 Yellow.
If your springs are due for replacement, start with that manufacturer-specified configuration unless your instructor or equipment documentation calls for something different.
The Reformer Shop carries Signature Springs for Reformers.
Do not order a generic five-spring kit simply because the Allegro 2 uses five springs.
The resistance and dimensions matter.
Buying Reformer Springs for a Studio Reformer
Balanced Body’s standard Studio Reformer configuration is:
3 Red + 1 Blue + 1 Green.
This illustrates why model-specific spring packages matter.
The Studio Reformer and Allegro 2 do not necessarily use identical standard spring configurations even though both use five springs.
Confirm the exact model before ordering.
Buying Reformer Springs for a Clinical Reformer
Balanced Body currently lists the Clinical Reformer configuration as:
3 Red + 1 Yellow + 1 Blue + 1 Green.
The additional spring gives the Clinical configuration a different resistance setup from the standard Allegro 2.
Again, this is why counting springs is not enough.
Pilates Reformer Springs for Metro IQ
Compact reformers can have their own spring configurations.
If you own the Balanced Body Metro IQ, use the manufacturer’s designated replacement spring system rather than assuming standard Allegro springs will work.
The Metro IQ is designed as a distinct reformer platform, so compatibility should be confirmed before ordering replacement parts.
This is especially important with compact and specialty reformers because spring length and attachment geometry can differ.
When Should You Replace Springs on a Used Reformer?
If the seller cannot document when they were installed, treat the spring age as unknown.
That does not automatically mean the reformer is a bad purchase.
It means you should budget for maintenance.
A used reformer with a strong frame, good carriage and worn springs can still be a sensible purchase.
But the cost of replacement springs should be included in your calculation.
This is particularly relevant when comparing a cheap used reformer against a more expensive machine with recently replaced springs.
The true cost is the cost of getting the equipment into safe, reliable working condition.
Should You Upgrade Springs?
Sometimes.
An upgrade can make sense if:
• Your manufacturer offers multiple spring configurations
• You need lighter resistance
• You need heavier resistance
• Your teaching style requires a broader range
• You have specific rehabilitation needs
• You are replacing an obsolete spring system
But do not upgrade simply because the springs have a higher resistance rating.
More resistance is not inherently better.
Clear Buying Recommendations
Best overall: Manufacturer-specific replacement springs
This is the recommendation for most buyers.
Buy springs designed for your exact reformer model.
Best for Balanced Body reformers: Signature Springs
If you own a compatible Balanced Body reformer, use the manufacturer’s Signature Spring system and model-specific configuration.
Best for Merrithew reformers: Merrithew replacement springs
Merrithew specifically matches its replacement springs to its equipment and recommends replacement at two-year intervals.
Best for a complete rebuild: Full spring package
If every spring is old or the history is unknown, replace the complete set rather than mixing old and new springs unnecessarily.
Best for a single damaged spring: Individual replacement
If the rest of your spring set is relatively new, replacing the specific damaged spring may be sufficient if the manufacturer offers it individually.
Best for rehabilitation: Appropriate lighter-resistance options
A lighter spring can be useful for some arm and rehabilitation exercises, but selection should be based on the actual exercise and user rather than spring color alone.
Best Pilates Reformer Springs by Buyer
| Buyer | Recommendation | Why |
|---|---|---|
| New reformer owner | Factory-compatible set | Correct configuration |
| Used reformer buyer | Full replacement set if age is unknown | Resets maintenance baseline |
| Balanced Body owner | Signature Springs | Manufacturer-specific |
| Merrithew owner | Merrithew replacement springs | Correct compatibility |
| Studio owner | Standardized full sets | Consistent programming |
| Rehab professional | Appropriate lighter options | More resistance flexibility |
| Single damaged spring | Individual replacement | Avoid unnecessary full replacement |
| Commercial studio | Track replacement dates | High usage |
| Home user | Model-specific package | Simpler maintenance |
Common Pilates Spring Buying Mistakes
Buying by color alone
Colors are not universal.
Mixing manufacturers
Physical compatibility does not guarantee appropriate resistance or safe operation.
Ignoring spring age
Old springs are a maintenance issue even when they look acceptable.
Replacing only the obviously damaged spring
If the entire set is old, replacing one spring does not reset the age of the rest.
Buying the heaviest springs available
More resistance is not automatically better.
Forgetting clips and holders
The spring system includes more than the coil itself.
Buying without checking the model
Different reformers can require different lengths and configurations.
Final Verdict: Which Pilates Reformer Springs Should You Buy?
The best Pilates reformer springs are the ones specified for your exact equipment.
For a Balanced Body reformer, start with the appropriate Signature Springs configuration.
For a Merrithew reformer, use the manufacturer’s replacement springs and follow its replacement schedule.
If you bought a used reformer and cannot establish the spring history, budget for a complete replacement set.
If only one spring is damaged and the remaining set is relatively new, an individual replacement may make more sense.
And do not choose springs simply because a color or resistance number sounds stronger.
The goal is consistent, appropriate and manufacturer-compatible resistance.
Springs are one of the least glamorous parts of a Pilates setup, but they are among the most important.
A beautiful reformer with worn or incorrect springs is still a poorly maintained reformer.
For current options, see the Signature Springs for Reformers at The Reformer Shop.
For manufacturer guidance, Balanced Body provides its current Signature Spring specifications and resistance information, while Merrithew provides a dedicated spring replacement and maintenance center.
Frequently Asked Questions
How often should Pilates reformer springs be replaced?
Merrithew recommends replacing reformer springs every two years to maintain performance and safety. Other manufacturers may provide different schedules or usage-based guidance, so follow the documentation for your equipment.
Which Pilates reformer springs are best?
The best springs are manufacturer-compatible springs designed for your specific reformer. There is no universal spring that is best for every machine.
What do Pilates spring colors mean?
Colors indicate relative resistance within a particular manufacturer’s system. Balanced Body currently uses yellow for very light, blue for light, red for medium and green for heavy.
Are Pilates spring colors universal?
No. Do not assume a red spring from one manufacturer has the same resistance as a red spring from another.
Can I use any springs on my reformer?
No. Spring length, resistance, attachment hardware and configuration can differ between manufacturers and models.
Should I replace all reformer springs at once?
If all the springs are of similar age and usage, replacing the complete set is usually the cleanest approach. If one spring is damaged while the others are relatively new, an individual replacement may be appropriate.
How do I know when reformer springs need replacing?
Look for corrosion, deformation, damaged coils, unusual resistance or other visible damage. Also consider the age and usage history of the springs.
Are heavier reformer springs better?
No. The appropriate spring depends on the exercise and user. A heavier spring is not automatically more effective.
Are lighter springs better for beginners?
Not necessarily. Some exercises become more challenging with less spring assistance. Resistance should be selected according to the exercise and appropriate instruction.
What springs does the Allegro 2 use?
Balanced Body currently lists the standard Allegro 2 configuration as three red, one blue and one yellow Signature Spring.
What springs does the Studio Reformer use?
Balanced Body currently lists three red, one blue and one green as the standard Studio Reformer configuration.
What springs does the Clinical Reformer use?
Balanced Body currently lists three red, one yellow, one blue and one green for the Clinical Reformer.
Should I replace springs when buying a used reformer?
If you cannot establish their age or maintenance history, budgeting for replacement is sensible. It gives you a known starting point for future maintenance.
Can I mix old and new reformer springs?
It may be technically possible in some circumstances, but it is better to follow the manufacturer’s specified configuration and avoid mixing springs with significantly different age or condition without appropriate guidance.
Where can I buy replacement Pilates springs?
Use a manufacturer-authorized or reputable Pilates equipment supplier and confirm the exact reformer model before ordering. The Reformer Shop carries Balanced Body Signature Springs and other Pilates equipment and accessories.
