9 Best Office Chair Gas Cylinder Replacement (October 2026)
The best office chair gas lift cylinder replacements include the The Office Oasis Office Chair Cylinder Replacement for a complete replacement kit, the Omyoffice 5.5 Inch Office Chair Gas Lift for a taller standard seat, and the Omyoffice 5.5” Office Chair Gas Lift Cylinder for standard-size measurements.
On this page (7 sections)
- How we chose an office chair gas cylinder replacement
- Which replacement gas cylinder fits your chair?
- The best office chair gas cylinder replacements
- How can you check gas cylinder compatibility?
- Should you choose a standard, short or extra-long cylinder?
- What else should you consider before replacing a chair cylinder?
- Which office chair replacement gas cylinder should you choose?
The Office Oasis Office Chair Cylinder Replacement is the best office chair gas cylinder replacement for many standard chairs because its 28 mm shaft and 50 mm column match common dimensions, and its kit includes a removal tool, gloves and instructions. If you need a higher or lower seat, compare the cylinder's compressed height and travel with your current lift before choosing.
A replacement gas lift may restore height adjustment when a chair keeps sinking, but “universal” does not mean every cylinder fits every chair. For a specific case, see why a Bossin chair is sinking.
Compare the old cylinder's length, diameter and activation type, then consider whether its height range suits your desk.
If the chair still works apart from the sinking seat, start with How to Fix an Office Chair That Keeps Sinking?. For the repair decision itself, read Can You Replace Office Chair Gas Cylinder?.
Our picks at a glance
-
1
Best for a complete replacement kitThe Office Oasis Office Chair Cylinder Replacement
9.7/10 our score
See it on Amazon -
2
Best for a taller standard seatOmyoffice 5.5 Inch Office Chair Gas Lift
9.6/10 our score
See it on Amazon -
3
Best for standard-size measurementsOmyoffice 5.5” Office Chair Gas Lift Cylinder
9.5/10 our score
See it on Amazon
- 4
Check itHOSALI Office Chair Cylinder Replacement
Best for a standard 5.5 in stroke - 5
Check itAinilaily 14" to 22" Long Adjustable Gas
Best for an extra-tall seat - 6
Check itRythalix 10-14 Inches Office Chair Cylinder Replacement
Best for short top-activated chairs - 7
Check itRythalix 11-16.5 Inches Office Chair Cylinder Replacement
Best for mid-height top-activated chairs - 8
Check itMySit 2.2" Stroke Office Chair Gas Lift
Best for lowering a chair - 9
Check itMASTERY MART 14-22 Inch Extra Long Office
Best for drafting and standing desks
How we chose an office chair gas cylinder replacement
The best office chair gas cylinder replacement needs to match the chair's connections and the seat height you want. We compared the stated cylinder dimensions, travel ranges, activation types and included removal items for these 9 options.
A common size is a 50 mm outer column with a 28 mm piston shaft, but some chairs need a different length or use side activation. We gave more weight to clearly stated dimensions and useful fit details, then included short and extra-tall cylinders for chairs outside the usual range.
Our score weighs specs, features and buyer feedback against what you're shopping for. The highest score goes to the option with common dimensions and a removal tool; lower scores reflect more specialized sizes or fit limits.
| Product | Best for | Piston shaft | Column | Included | Our score |
|---|---|---|---|---|---|
| The Office Oasis Office Chair Cylinder Replacement | a complete replacement kit | 1-1/8 in (28 mm) | 2 in (50 mm) | Removal tool, gloves and instructions | 9.7 |
| Omyoffice 5.5 Inch Office Chair Gas Lift | a taller standard seat | 9.6 | |||
| Omyoffice 5.5” Office Chair Gas Lift Cylinder | standard-size measurements | 9.5 | |||
| HOSALI Office Chair Cylinder Replacement | a standard 5.5 in stroke | 9.4 | |||
| Ainilaily 14" to 22" Long Adjustable Gas | an extra-tall seat | 9.1 | |||
| Rythalix 10-14 Inches Office Chair Cylinder Replacement | short top-activated chairs | 8.9 | |||
| Rythalix 11-16.5 Inches Office Chair Cylinder Replacement | mid-height top-activated chairs | 8.6 | |||
| MySit 2.2" Stroke Office Chair Gas Lift | lowering a chair | 8.4 | |||
| MASTERY MART 14-22 Inch Extra Long Office | drafting and standing desks | 8.2 |
Which replacement gas cylinder fits your chair?
A cylinder fits when its connection dimensions and activation style match the chair, and its compressed height and travel give you the right seat range. For a leaning antique chair, see how to fix an antique chair.
Measure your current cylinder before choosing by brand name or a “universal” label.
Check the shaft at the top and the outer column that enters the base. Also note whether the chair's adjustment lever presses down on the cylinder from above or connects through a side mechanism.
The height range determines how low and high the seat can go after installation. A short cylinder may lower a chair, while an 8 in travel lift may suit a drafting chair but raise a regular desk chair too far.
If its wheels won't roll, see drafting chair wheel fixes.
The best office chair gas cylinder replacements
The Office Oasis is the highest-scoring pick and a complete kit for many standard chairs. The other options suit different chair heights and connection needs, so compare each cylinder with your chair before buying.
The Office Oasis Office Chair Cylinder Replacement: Best for a complete replacement kit
- 28 mm piston shaft
- 50 mm column
- Class 4 cylinder
- Removal tool, gloves and instructions included
A standard-size cylinder comes with a purpose-built removal tool, gloves and step-by-step instructions. The Office Oasis offers a lifetime warranty.
Pros
- Removal tool and gloves included
- Dimensions are stated
- Lifetime warranty
Cons
- Check your chair's dimensions and mechanism before ordering
The Office Oasis cylinder is a strong option for a standard chair when you want removal help included in the box. It has a 1-1/8 in (28 mm) piston shaft and a 2 in (50 mm) column, dimensions that fit almost every office chair according to the brand.
The kit includes a purpose-built cylinder removal tool, gloves and step-by-step installation instructions. That can reduce the need to find separate tools, especially if the old cylinder is stuck in the base.
The Office Oasis describes the cylinder as Class 4 and offers a lifetime warranty. Those details may matter if you want support after the repair, though the chair still needs to match the cylinder's dimensions.
Choose it for a standard chair when the measurements line up. If your chair has a side-activated mechanism or a nonstandard cylinder, check compatibility before ordering.
Omyoffice 5.5 Inch Office Chair Gas Lift: Best for a taller standard seat
- 5.5 in adjustable height
- 11.4 in compressed height
- 16.9 in expanded height
- For most chairs, but not every chair
This 5.5 in travel cylinder reaches a higher position than a typical lift. Its stated fit covers many chair types, though you should check your original cylinder's measurements.
Pros
- Clear compressed and expanded heights
- 5.5 in of travel
- Designed for several chair types
Cons
- Does not fit every chair
Omyoffice's 5.5 in gas lift suits buyers who need a little more seat height than a standard cylinder provides. It measures 11.4 in compressed and 16.9 in expanded, with the travel range stated as 5.5 in.
The brand describes the cylinder as suitable for most office, salon, executive and work chairs, and rolling stools. It also notes that it won't fit every chair, so compare the old lift's length and dimensions first.
This is a useful pick when your current chair sits too low at its highest setting, but you don't need an extra-long drafting cylinder. The product data only confirms one cylinder is included, so plan for removal tools separately.
Omyoffice 5.5” Office Chair Gas Lift Cylinder: Best for standard-size measurements
- 5.5 in adjustable height
- 50 mm outer cylinder
- 28 mm inner cylinder
- Class 4 piston
The Omyoffice lift gives dimensions for both cylinder ends and a 5.5 in travel range. Compare those measurements with your chair before replacing its gas lift.
Pros
- Both cylinder diameters are stated
- 5.5 in travel
- Class 4 piston
Cons
- Measure your existing cylinder to confirm fit
This Omyoffice cylinder gives dimensions for both ends: 50 mm outer diameter and 28 mm inner diameter, with a 5.5 in stroke. Its stated compressed and expanded heights are 11.4 and 16.9 in.
The product data describes a Class 4 piston built from solid steel, and Omyoffice describes smooth, quiet rotation. Those claims don't replace a fit check, especially if the original chair cylinder has a different length or connection.
Pick this model when you want a 5.5 in travel range and can confirm the matching diameters. The measurements help distinguish it from a similar-looking cylinder that may not fit your chair.
HOSALI Office Chair Cylinder Replacement: Best for a standard 5.5 in stroke
- 50 mm base socket fit
- 28 mm piston shaft
- 5.5 in stroke
- Gloves included
HOSALI specifies the common 50 mm base socket and 28 mm piston shaft, plus a 5.5 in stroke. Gloves are included, and a rubber mallet may be needed to remove an old cylinder.
Pros
- Fit dimensions are stated
- Gloves included
- 5.5 in stroke
Cons
- Old cylinder removal may require a rubber mallet
HOSALI gives specific connection measurements for a common chair setup: a 50 mm base socket and 28 mm piston shaft. Its 5.5 in stroke runs from 11.22 to 16.7 in.
The package includes gloves, and HOSALI says a rubber mallet may be needed to remove the old cylinder from the base. No extra screws are required for installation, though the old cylinder may take effort to loosen.
Choose HOSALI if those measurements match your chair and you want a stated 5.5 in travel range. Check your old cylinder first, since a standard socket diameter alone does not confirm the full fit.
Ainilaily 14" to 22" Long Adjustable Gas: Best for an extra-tall seat
- 8 in height range
- 14.3 in compressed height
- 22.3 in expanded height
- 450 lb stated capacity
This lift has an 8 in range and a higher compressed and expanded height than standard replacement cylinders. Measure carefully, since that extra height may not suit a regular desk chair.
Pros
- Long 8 in travel
- Heights are stated
- Suitable for chairs and stools
Cons
- 450 lb stated capacity
- May raise a standard chair too high
Ainilaily is the tallest option here, with 14.3 in compressed height, 22.3 in expanded height and 8 in of travel. It suits a drafting chair, stool or setup that needs a higher seat, rather than a typical low desk chair.
Ainilaily gives a 450 lb weight capacity and says the cylinder fits most executive chairs and stools. It recommends measuring the original cylinder before ordering, which is especially important with this long range.
Choose it when your existing chair is designed for a high seat or your desk requires one. If the chair has a normal desk-chair height, the extra reach may put your feet too far from the floor.
Rythalix 10-14 Inches Office Chair Cylinder Replacement: Best for short top-activated chairs
- 10.1 to 14 in height range
- 3.9 in travel
- Top-activated only
- Not compatible with side-activated chairs
The shorter height range suits some top-activated chairs where a standard lift sits too high. Rythalix says this cylinder does not fit side-activated chairs.
Pros
- Shorter 10.1 to 14 in range
- Activation type is specified
- Gloves included
Cons
- Not for side-activated chairs
Rythalix's 10–14 in cylinder has a stated 3.9 in travel range and is designed for top-activated chairs. Rythalix says it does not fit side-activated chairs.
That activation warning matters because a similar length alone won't make the cylinder compatible if the chair uses an offset side valve. Check the chair's mechanism before comparing this model with a standard lift.
Choose this cylinder when the chair is top-activated and needs the shorter range. The stated range makes it easier to compare with the old cylinder's height and the seat position you want.
Rythalix 11-16.5 Inches Office Chair Cylinder Replacement: Best for mid-height top-activated chairs
- 11 to 16.5 in height range
- 5.5 in travel
- Top-activated only
- Not compatible with side-activated chairs
This Rythalix size provides 5.5 in of travel in a top-activated design. Check the chair's activation mechanism before considering it.
Pros
- 5.5 in travel
- Height range is stated
- Gloves included
Cons
- Not for side-activated chairs
This Rythalix model extends from 11 to 16.5 in, with 5.5 in of travel. It shares the top-activated design and side-activated incompatibility of the shorter Rythalix option.
The stated height range can work for a chair that needs more lift than the 10–14 in model provides. Rythalix says the cylinder has a 28 mm shaft, so compare that measurement along with the total cylinder length.
Choose it only if your chair is top-activated and the dimensions match. A side-activated chair needs a compatible cylinder designed for that mechanism.
MySit 2.2" Stroke Office Chair Gas Lift: Best for lowering a chair
- 2.2 in adjustable height
- 8.5 in compressed height
- 10.7 in expanded height
- Short design for high chair bases
The MySit lift has a short 8.5 to 10.7 in height range that can lower a chair seat. Its base clearance requirement matters: the chair feet must be over 2.4 in high.
Pros
- Short height range
- 2.2 in travel
- No additional screws required
Cons
- Base feet must clear 2.4 in
MySit is the shortest cylinder in this group, with 8.5 in compressed height and 10.7 in expanded height. Its 2.2 in adjustment range can help lower a chair that sits too high.
The design is intended for a high chair base, and the legs must be over 2.4 in high to clear the floor. Check that clearance along with the cylinder fit before you install it.
Choose MySit when your chair needs a short lift and the base meets that clearance requirement. It won't provide the height range of a standard 5.5 in travel cylinder.
MASTERY MART 14-22 Inch Extra Long Office: Best for drafting and standing desks
- 8 in stroke
- 13.97 in compressed length
- 21.85 in extended length
- Gloves included
This extra-long lift is aimed at drafting chairs, bar stools and standing desk chairs. Measure both ends of your old cylinder and confirm the higher seat range suits your setup.
Pros
- 8 in stroke
- Fit diameters are stated
- Gloves included
Cons
- Likely too tall for many standard desk chairs
MASTERY MART's extra-long cylinder is aimed at drafting chairs, bar stools, counter-height stools and standing desk chairs. Its 8 in stroke runs from 13.97 to 21.85 in, so it can lift the seat well above standard desk-chair height.
MASTERY MART specifies a 50 mm outer cylinder and 28 mm shaft, and gloves are included. Measure both ends of the old cylinder and consider the seat's final height before choosing this longer model.
Pick it for a tall chair setup that needs a wider height range. For a regular desk chair, a shorter replacement may be more suitable.
How can you check gas cylinder compatibility?
You can check compatibility by measuring the old cylinder's shaft diameter, outer column diameter, compressed length and travel, then checking the chair's activation style. Compare those details with the replacement before ordering.
Measure the metal cylinder rather than the full chair height. If the old cylinder is stuck in place, use the chair's model information or ask the chair maker for the cylinder dimensions.
A cylinder described as universal may still have a height range or activation type that excludes your chair. Rythalix says its two options here are not for side-activated chairs.
Should you choose a standard, short or extra-long cylinder?
Choose a standard 5.5 in cylinder for many regular office chairs, a short lift when the seat needs to sit lower, and an extra-long lift for drafting or standing desk setups. Compare the compressed and expanded heights with the seat positions you need.
A short cylinder like MySit's can reduce seat height, but the base feet need more than 2.4 in of clearance. Extra-long cylinders such as Ainilaily or MASTERY MART can raise the chair substantially, so check your desk and foot support.
If your goal is keeping the seat low, see How to Keep an Office Chair at Its Lowest Height. For a step-by-step repair walkthrough, use How to Replace Office Chair Gas Cylinder?.
What else should you consider before replacing a chair cylinder?
A replacement may be useful when the rest of the chair is in working order and the gas lift is the problem. Compare the part's cost with the condition of the seat, base, wheels and adjustment mechanism.
For a cost comparison, read How Much Does a Gas Lift Cylinder Cost? and How Much Do Office Chair Replacement Parts Cost?. If you're also changing your desk setup, How to Use a Logitech Lift Mouse covers a separate ergonomic accessory.
Which office chair replacement gas cylinder should you choose?
Choose The Office Oasis for a standard-size cylinder with removal tools and instructions, Omyoffice or HOSALI for a 5.5 in travel option with stated dimensions, and a Rythalix cylinder only if your chair is top-activated. For a low seat, consider MySit; for a drafting or standing desk chair, compare the extra-long options.
Measure the old lift's diameters and length before ordering. The closest match to those measurements is more useful than a broad compatibility claim.
Our top 3 picks at a glance
-
1
Best for a complete replacement kit
The Office Oasis Office Chair Cylinder Replacement
9.7/10 our score
See it on Amazon -
2
Best for a taller standard seat
Omyoffice 5.5 Inch Office Chair Gas Lift
9.6/10 our score
See it on Amazon -
3
Best for standard-size measurements
Omyoffice 5.5” Office Chair Gas Lift Cylinder
9.5/10 our score
See it on Amazon
Frequently asked questions
How do I choose the right replacement gas cylinder for an office chair?
Match the old cylinder's length, travel range, end diameters and activation style. Measure the metal cylinder itself and check whether your chair uses a top-activated or side-activated mechanism.
A claimed universal fit still may not match your chair, so compare dimensions before ordering.
Are office chair gas lift cylinders universal?
Many replacement cylinders use common dimensions, but compatibility is not universal. Chair mechanisms, cylinder lengths and activation styles can differ.
Check the base socket and piston shaft measurements, then compare the compressed height and travel with your current lift.
Can I use a longer gas cylinder in my office chair?
Yes, if the cylinder matches the chair's connection dimensions and the higher seat range works for your desk. Extra-long cylinders can suit drafting chairs or standing desks.
Check both the compressed and expanded heights before replacing a standard lift.
What tools do I need to replace an office chair gas cylinder?
You may need a rubber mallet to loosen a stuck cylinder from the chair base. The Office Oasis kit includes a removal tool, while HOSALI includes gloves and notes that a mallet may be needed.
Follow the chair and cylinder instructions during removal and installation.
