Replace your office chair gas lift? Fix a chair that sinks down easily

Does your office chair or gaming chair slowly sink down without using the lever? Then chances are your gas lift (gas spring) is worn out or defective. This is one of the most common causes of a chair that keeps sinking and a height adjustment that no longer works.

The good news: in most cases you don’t need to buy a new chair. In this guide we explain how to replace the gas lift of your office chair or gaming chair yourself, which gas spring you need, and what to pay attention to during installation and safety.

How to recognize a faulty gas lift (gas spring)?

You usually notice a defective gas lift immediately while sitting. Common signs are:

• Your office chair sinks down by itself (slowly or suddenly)
• The chair does not stay at the correct height
• You have to raise the chair again and again
• The height adjustment feels unstable or jerky

Why replacing a gas lift / gas spring is important

A faulty gas spring directly affects your sitting comfort, posture and safety. When your chair keeps sinking, you often sit incorrectly without noticing, which can cause physical complaints.

By replacing the gas lift:

• you restore the correct seat height and ergonomics
• you prevent back, neck and shoulder pain
• you extend the lifespan of your office chair or gaming chair
• you save money compared to buying a new chair

Ranqer Gas Lift / Gas Spring Class 4 – the best replacement for your office chair

The Ranqer Gas Lift Class 4 for office & gaming chairs (22–28 cm) is a high-quality replacement gas spring designed for long-term and safe use. Ideal if your office chair or gaming chair keeps sinking down and you want to restore the height adjustment.

• Class 4 quality with high load capacity
• Smooth and stable height adjustment
• Long lifespan and extra safety
• Suitable for many office chairs and gaming chairs

A practical solution for working from home, gaming setups and professional workplaces.

Replacing the gas lift: how it works (office chair & gaming chair)

Replacing a gas lift is usually simple and can often be done within a few minutes. Work carefully, make sure the chair is stable and use the right tools to avoid damage.

Step-by-step guide: replacing an office chair gas lift / gas spring

1. Step 1 – Gather the necessary tools
   Prepare a rubber mallet, a flathead or Phillips screwdriver and, if needed, some WD-40 or lubricant. These tools help loosen stuck parts and remove the gas lift safely without damaging the chair. Make sure you work on a stable surface.
2. Step 2 – Remove the base from the gas lift
   Turn the chair upside down so the bottom is visible. Use the rubber mallet to gently and evenly tap the bottom of the chair base or the gas lift. Slowly pull the base off the gas lift. Repeat if necessary until the base comes loose.
3. Step 3 – Remove the gas spring from the seat
   Keep the chair upside down so the underside is accessible. Tap carefully around the gas lift at the bottom of the seat using the rubber mallet. Slowly and carefully pull the old gas lift out of the seat. Repeat if needed until it is fully removed.
4. Step 4 – Clean and inspect the parts
   Clean the chair base, seat and mounting points with water or soapy water to remove dust, dirt and grease. Dry all parts thoroughly before continuing. This ensures the new gas lift fits properly and prevents noise or looseness.
5. Step 5 – Install the new gas lift and reassemble the chair
   Insert the new gas spring carefully into the chair base and make sure it is firmly seated. Then place the seat straight down onto the gas lift and press everything firmly into place. Test the chair for stability and check that the height adjustment works smoothly again.

For additional instructions, you can also consult the official instruction manual.

Instruction video: replacing a gas lift / gas spring

In this video you can see exactly how to replace a gas lift step by step:

How to remove a gas spring from a gaming chair / office chair – Ranqer tutorial

Final check and useful tips

After installation, check that the chair moves smoothly up and down and stays at the correct height. If everything is installed correctly, the height adjustment should work immediately.

• Tip: Always use a rubber mallet to avoid damaging the parts.
• If the gas lift is difficult to remove, apply a small amount of WD-40 and try again with controlled taps.
• Always test the stability of the chair before using it for long periods of sitting or gaming.

Do you have questions about which gas lift is suitable for your office chair or gaming chair? Feel free to contact our support team.

FAQ: frequently asked questions about replacing a gas lift / gas spring

Why does my office chair keep sinking down?

In most cases the gas lift is worn out or leaking pressure, which prevents the chair from holding its height. Replacing the gas spring restores proper height adjustment.

Is replacing a gas lift difficult?

Usually not. With a rubber mallet and a stable workspace, you can remove and replace the gas lift of many office chairs and gaming chairs yourself. Follow the step-by-step guide and work carefully.

Which gas lift do I need for my office chair?

Pay attention to the length/stroke (for example 22–28 cm), the class (for example Class 4) and whether the gas lift fits your chair model. A Class 4 gas lift is often a strong choice for durability and safety.

Can I use WD-40 to loosen a stuck gas spring?

Yes, a small amount of WD-40 or lubricant can help loosen tight mounting points. Use it sparingly and let it soak in briefly before continuing.