How to Replace a Gas Lift on a Gaming or Office Chair

Why does a gas lift fail?

At ChairRepair.eu, we specialise in gaming chair and office chair spare parts across Europe — and gas lift replacement is one of the most common repairs we help customers with. Gas lifts are sealed cylinders that gradually lose pressure over time. Daily sitting and standing puts stress on the cylinder, and gaming chairs are exposed to more dynamic use than standard office chairs — fast movements and harder sitting can create short bursts of force significantly higher than body weight. In some cases loads exceed 120 kg, even if the user weighs less. This is why using a BIFMA-certified gas lift matters.

Step-by-step instructions

Before you start, make sure you have the right gas lift size for your chair. Browse our full gas lift range to compare Class 3, Class 4 and Heavy Duty options.

Step 01

Remove the seat from the base

Tip the chair on its side or upside down. Pull the seat mechanism away from the gas lift. If stuck, tap gently with a rubber mallet while twisting slightly.

Step 02

Remove the gas lift from the base

With the seat removed, pull the gas lift cylinder upward out of the chair base. It may need a firm tug or a few taps from below.

Need a replacement gas lift?BIFMA-certified Class 3, Class 4 and Heavy Duty. Ships from EU.

Find the right gas lift →

Step 03

Insert the new gas lift

Push the new gas lift cylinder down into the chair base until it sits securely. Make sure it is straight and fully seated before continuing.

Step 04

Reattach the seat mechanism

Lower the seat mechanism onto the top of the gas lift and press firmly until it locks into place.

Step 05

Test the height adjustment

Sit in the chair and test the lever. The chair should now hold its height without sinking. If it still sinks, check that the cylinder is fully seated in the base.

Tips & notes

💡 Class 3 vs Class 4

Class 3 suits lighter users or occasional use. Class 4 is standard for most gaming chairs. Heavy Duty Class 4 is ideal for daily use or users over 90 kg. If you are not sure which size fits your chair, read our gas lift measuring guide. If in doubt, go Class 4.

💡 BIFMA certification matters

Our gas lifts are BIFMA-certified and tested to 14,000 Newtons — essential for gaming chairs under heavy dynamic use. Many cheap replacements are not certified and fail within months.

Need a replacement gas lift?

Class 3, Class 4 and Heavy Duty Class 4 — BIFMA-certified, EU-shipped from €19.90.

Browse Gas Lifts →