When it comes to reformer Pilates, one of the most important components — yet often overlooked — is the spring system.
Not all springs are created equal.
If you’ve been comparing reformers, you may have noticed something subtle:
some use green springs, while others use blue.
This isn’t just a colour difference — it reflects a difference in quality, performance, and overall training experience.
The Key Difference at a Glance
- German springs (blue) → Premium quality, smooth resistance, longer lifespan
- Korean springs (green) → Standard quality, more basic resistance, shorter lifespan
While both will function, the feel and performance can vary significantly over time.
Resistance & Performance
German Springs (Blue)
German-engineered springs are known for their precision and consistency. They provide a smooth, controlled resistance throughout the entire movement — which is crucial for maintaining proper form and control.
You’ll notice:
- More fluid transitions
- Balanced tension from start to finish
- A more “premium” training feel
Korean Springs (Green)
Korean springs still provide resistance, but often feel:
- Slightly less smooth
- Less consistent under load
- More “springy” or abrupt at certain points
For beginners, this may not be immediately noticeable — but over time, the difference becomes clear.
Durability & Longevity
German Springs (Blue)
Built to last, German springs are designed for high-frequency use — whether at home or in a commercial studio.
They typically:
- Maintain tension longer
- Resist stretching and fatigue
- Require fewer replacements over time
Korean Springs (Green)
While functional, Korean springs tend to:
- Lose tension faster
- Wear down sooner
- Require more frequent replacement
Training Experience
This is where the difference really matters.
A reformer is all about control, precision, and flow — and the springs play a huge role in that.
German springs deliver:
- Better control
- Smoother movement
- More confidence in each exercise
Korean springs can feel:
- Slightly less refined
- Less predictable over time
How to Tell the Difference
One of the easiest ways to identify the spring type is by colour:
- Blue springs = German (premium)
- Green springs = Korean (standard)
If you’re comparing products, this is a quick visual cue that can tell you a lot about the quality of the machine.
Which One Should You Choose?
Choose German springs (blue) if you want:
- A smoother, more controlled workout
- Long-term durability
- A premium, studio-quality experience
Choose Korean springs (green) if:
- You’re looking for a more budget option
- You’re okay with a more basic feel
Final Thoughts
While both spring systems will allow you to train, the difference in quality becomes more noticeable the more you use your reformer.
If you’re investing in a machine for long-term use, performance, and consistency — the spring system is not something to overlook.
Experience the Difference
At CoreForm, our reformers are equipped with premium German spring systems (blue springs) — designed to deliver a smoother, more controlled, and long-lasting training experience.