The right gas lift affects:

• Seating height
• Ergonomics
• Stability
• Tilt performance
• Long-term durability

At Bizniz Chairs, we often see chairs fitted with incorrect or low-quality cylinders that fail prematurely or leave the chair sitting at the wrong height.

Here’s what you should know before buying a replacement gas lift cylinder.

The Two Most Common Gas Lift Types

In South Africa, the two most commonly used office chair gas lifts are:

1. 235mm Typist Gas Lift

This is commonly found on:

• Operator chairs
• Typist chairs
• Slightly elevated office chairs
• Task seating

These chairs usually sit slightly higher and are designed for active desk work and longer workstation use.

2. 200mm Executive Gas Lift

This is commonly used on:

• Executive chairs
• Manager chairs
• Boardroom chairs
• Lower sitting office chairs

These typically provide a lower seating position with a more relaxed executive-style sitting height.

Important: They Usually Interchange

One of the most useful things customers should know:

A 235mm Typist gas lift and a 200mm Executive gas lift will usually still physically fit the same chair.

The mounting tapers are generally compatible on most office chairs.

That means:

• If you accidentally buy a Typist lift instead of an Executive lift, the chair will usually still work.
• If you install an Executive lift on a Typist chair, it will usually still fit correctly.

The main difference will simply be the final seating height.

For example:

• Installing a 235mm Typist lift on an executive chair will make the chair sit slightly higher.
• Installing a 200mm Executive lift on a typist chair will make the chair sit lower.

This is one of the most common mistakes customers make when ordering replacement gas lifts — and fortunately, it usually does not damage the chair.

Other Common Gas Lift Types

200mm Executive Double Taper Gas Lift

Used on:

• Modern executive chairs
• Mid-back office chairs
• Certain designer office chairs

The tapered body design improves compatibility and appearance on specific chair bases and mechanisms.

200mm Special Column Gas Lift

Designed for:

• Heavy-duty executive chairs
• Multi-function mechanisms
• Large tilt systems

These are commonly used where the chair has:

• Bulky under-seat mechanisms
• Heavier seat systems
• Larger load requirements

The larger body design provides improved support and stability.

385mm Draughtsman Gas Lift

Used for:

• Draughtsman chairs
• Workshop chairs
• Laboratory seating
• High counters and elevated workstations

These provide significantly more height adjustment than standard office chair cylinders.

Why Gas Lift Quality Matters

Many imported office chairs come fitted with:

• Class 2 gas lifts
• Lower-cost internal components

These are typically designed for:

• Lighter use
• Lower weight capacity
• Shorter lifespan

At Bizniz Chairs, we upgrade customers to Class 4 gas lift cylinders, which offer:

• Higher load capacity
• Thicker steel construction
• Improved safety
• Better durability
• Longer service life

Class 4 cylinders are considered the commercial-grade standard for professional office seating.

Final Thoughts

Choosing the correct gas lift is not only about fixing a sinking chair — it’s about restoring proper seating height, comfort, and long-term reliability.

The good news is:

• Most office chair gas lifts share similar mounting tapers
• Many models are interchangeable
• The biggest difference is usually chair height

If you���re unsure which cylinder your chair needs, professional assessment can help avoid ordering the wrong size.

Bizniz Chairs

Professional Office Chair Repairs & Upgrades

✔ On-site chair repairs

✔ Class 4 gas lift upgrades

✔ Tilt mechanisms & wheel bases

✔ Upholstery & chair restoration

📍 Amanzimtoti → Durban

📞 Call Us: 066 243 4867

📲 WhatsApp: 071 848 0829

🌐 biznizchairs.co.za