---
product_id: 215223393
title: "8\" Chair Hydraulic Cylinder Replacement for Office Chair Gas Lift Cylinder"
brand: "dozyant"
price: "387.85 DT"
currency: TND
in_stock: true
reviews_count: 13
category: "Dozyant"
url: https://www.desertcart.tn/products/215223393-8-chair-hydraulic-cylinder-replacement-for-office-chair-gas-lift
store_origin: TN
region: Tunisia
---

# 450 lbs heavy-duty capacity 8-inch adjustable stroke 360° smooth noiseless rotation 8" Chair Hydraulic Cylinder Replacement for Office Chair Gas Lift Cylinder

**Brand:** dozyant
**Price:** 387.85 DT
**Availability:** ✅ In Stock

## Summary

> 🚀 Elevate your workspace — sit tall, work smart!

## Quick Answers

- **What is this?** 8" Chair Hydraulic Cylinder Replacement for Office Chair Gas Lift Cylinder by dozyant
- **How much does it cost?** 387.85 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/215223393-8-chair-hydraulic-cylinder-replacement-for-office-chair-gas-lift)

## Best For

- dozyant enthusiasts

## Why This Product

- Trusted dozyant brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Universal Fit, No Hassle:** Standard 2-inch outer diameter fits most office chairs; easy DIY installation with no extra screws required.
- • **Durable Alloy Steel Build:** Powder-coated steel construction ensures long-lasting strength and a sleek modern finish.
- • **Whisper-Quiet 360° Swivel:** Experience smooth, noiseless rotation in every direction—work in comfort without distractions.
- • **Built to Support Power Users:** Class 4 gas lift cylinder engineered to hold up to 450 lbs, ideal for executive and big & tall chairs.
- • **Effortless Height Customization:** Adjust your chair height seamlessly with a full 8-inch stroke for perfect ergonomic alignment.

## Overview

This 8-inch Class 4 hydraulic gas lift cylinder replacement is designed for office chairs, offering an adjustable height range from 11.2 to 22.5 inches. Built with durable alloy steel and a powder-coated finish, it supports up to 450 lbs and provides smooth, noiseless 360-degree swivel motion. Easy to install with a universal 2-inch diameter fit, it’s the perfect upgrade for professionals seeking ergonomic comfort and reliability without replacing their entire chair.

## Description

Description: Frustrated to find that the office chair you sit on for years start sagging or can’t go up and down anymore? But not ready to buy a new one because the rest of the chair is in perfect shape? Why not get to fix it by changing the gas lift cylinder by yourself? How to make sure the gas lift cylinder fits your office chair? Check the outer and inner diameter of your broken gas lift cylinder. This replacement part fits the one with an outer diameter of 2" and inner diameter of 1.1". How to install the gas lift cylinder on your own? 1. Tip the chair onto its side. 2. Use the rubber mallet to tap and remove the base of the chair away from the seat. 3. Use the pipe wrench to clamp tightly onto the top of the cylinder. Twist and then pull up in order to remove the cylinder. 4. Remove the orange cap of the new cylinder. Insert the bottom of the cylinder into the center of the chair base. 5. Carefully lift both the chair base and the chair cylinder into the chair mechanism. The parts will then fasten on their own. Specifications: - Material: Steel - Outer Cylinder Diameter: 2" - Inner Cylinder Diameter: 1.1" - Stroke: 8" - Bearing Capacity: 450 lbs Package Content: - 1 Office Chair Gas Lift Cylinder

Review: I am tall - this does the job - I beat the old one out by whacking it with a sledgehammer. I would not say it was easy but it's no more difficult than any other tube would be to install. The right tools would be a must especially for someone who hasn't done it before. I have a bit of experience assembling chairs (unfortunately!) and so I knew how to get the tube out hitting in the correct spots. For the bottom part of the tube that connects to the legs/casters I turned the chair sideways so the floor was supporting the chair and the legs and then I beat the bottom of the tube out of the legs with a small metal mallet/sledgehammer. After removing the legs, I needed to get the chair off the top of the tube. For the top of the tube I slightly damaged the paint under my chair whacking the metal all around the chair near the top of the tube to try to pop the chair off the tube. I did not whack the tube, only around it with firm strokes parallel to the tube, hitting the base of the chair near the tube's connection, carefully tapping it out. Or actually not very carfully- you do have to whack it good. While whacking I had a good grip on the base of the tube pulling it away from the chair as I whacked the chair. The you put the new tube in the base, carefully align the seat to the top of the tube and set it straight down. Carefully knee it in the middle to make sure it's snug and centered and solid then put some weight on it by sitting. Bounce a bit to get it good and snug. Done. After I got the new tube on, and with the chair upright, you can't see the paint marks that I made, so it's fine for me. Also, like some others, I have trouble getting the thing to activate up and down. Make sure you fully compress the chair seat onto the top of the tube. Bounce your butt square in the middle to get it good and snug. Wiggle and bounce. Then try to activate it, maybe bounce a bit while trying to activate it. I noticed the knobby on the top of this tube is a bit smaller than the knobby on the tube that came with my chair. That's probably why it's difficult to activate. Anyway, once I got it activated and the chair lifted up and I could swing my feet I felt like I was in heaven. I'm 6'2 and I probably am on the longer side of average when it comes to my legs... In other words I have long legs, not short legs. This is important because some tall guys have a longer torso and shorter legs - not drastic enough to notice but definitely enough to matter when it comes to your chair height. Point is that this tube should be fine for most 6'2" guys. However I will say it's just barely enough. I also have 4" wheels on my chair too, so that might be something you need to look into. I bought these and they've been great for me: https://www.desertcart.com/gp/product/B00NFQAVZA/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1 I won't need to adjust the chair at all so the adjustment being finicky doesn't bother me. It's amazing to sit at my desk without having to tuck my legs and feet in odd positions.. Five stars because this product, while not perfect, I think it is a good functionality for the price. I hope it lasts!
Review: Great for Big Man and Easier to Install than it looks! - Seems like a high quality product. Just installed today. We'll see! I am 6' 5" tall and just under 300 pounds! This thing raises higher than the blown out cylinder which is a plus. It also accommodates my weight so there is no worry there. I would recommend this item over the competition that comes with gloves and a couple rings (plastic and can break, read others reviews!) that help you pull apart. For the same cost, get this item, a small can of WD 40, and a 14" pipe wrench (that won't break and you can use for something else) all for the same cost or less that the combo thingy. Lube the old cylinder that typically sticks under the seat, with the WD 40, then afterwards, use pipe wrench and viola!. Chair is repaired and you got WD 40 and a pipe wrench. Update: it’s now 3 years later and the thrill is gone. Chair sinks ever so slowly you don’t realize how much until I’ve gotten up and came back to realize the lowered position. About to reorder this one or another brand. Good that I have WD40 and pipe wrench available. 6 May 2024: My new cyclinder came in yesterday and it is the exact one I originally ordered. I was actually pleased with the maker, even though it only lasted 3 years. $20-$25 dollars to get three years is worth it to me. Again, I have all the tools mentioned before and the removal and install processes were the same. I sitting pretty again. Also at the start I am 6'5" and was 280lbs. Same height but now 245 lbs so I should get an extra year (?) We will see.

## Features

- 8" STROKE FOR ADJUSTING CHAIR HEIGHT: Minimum length: 11.2 inches; maximum length when fully extended: 22.5 inches; adjustable range: 8 inches
- HEAVY DUTY Gas lift cylinder that holds great weights - tall center support column of the chair. Holds up to 450 lbs on most office, executive and computer chairs. Highest End Class 4 gas cylinder on market.
- STANDARD CYLINDER DIAMETER: Outer cylinder: 2 inches, Inner cylinder: 1. 1 inches. Please confirm the measurement before ordering.
- SMOOTH & NOISELESS: Full 360 degree rotation, smooth and noiseless movements to all directions
- EASY INSTALLATION : Can be installed easily with no additional screws required.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B085XK494H |
| Additional Features | Arm Rest |
| Age Range Description | Adult |
| Assembly Instructions Description | Assembly Required, Instructions Included |
| Back Style | Solid Back |
| Best Sellers Rank | #24,063 in Office Products ( See Top 100 in Office Products ) #546 in Office Furniture Accessories #735 in Home Office Desk Chairs |
| Brand | DOZYANT |
| Brand Name | DOZYANT |
| Color | Black |
| Customer Reviews | 4.5 out of 5 stars 7,761 Reviews |
| Fill Material | Foam |
| Finish Types | Powder Coated |
| Form Factor | 360 |
| Frame Material Type | Alloy Steel |
| Furniture Base Movement | Swivel |
| Furniture Finish | Stainless Steel |
| Included Components | Office Chair Gas Lift Cylinder |
| Indoor Outdoor Usage | Indoor |
| Item Depth | 8 inches |
| Item Dimensions | 2 x 2 x 11 inches |
| Item Dimensions D x W x H | 2"D x 2"W x 8"H |
| Item Highlight | Universal Class 4 office chair gas lift cylinder replacement 450 lbs heavy duty piston fits most executive office desk chairs |
| Leg Style | Straight Leg |
| Manufacturer | DOZYANT |
| Manufacturer Part Number | QG-8 |
| Material | Alloy Steel |
| Material Type | Alloy Steel |
| Maximum Weight Recommendation | 450 pounds |
| Model Name | QG-8 |
| Model Number | QG-8 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Pattern | Solid |
| Product Care Instructions | Wipe Clean |
| Product Dimensions | 2"D x 2"W x 8"H |
| Reclining Position Count | 1 |
| Recommended Uses For Product | Office |
| Room Type | Office |
| Seat Height | 22.5 inches |
| Seat Material | Alloy Steel |
| Shape | Cylindrical |
| Size | 8 inch |
| Style Name | Modern |
| Surface Recommendation | Hard Floor |
| Unit Count | 1 Count |

## Product Details

- **Brand:** DOZYANT
- **Color:** Black
- **Material:** Alloy Steel
- **Product Dimensions:** 2"D x 2"W x 8"H
- **Size:** 8 inch

## Images

![8" Chair Hydraulic Cylinder Replacement for Office Chair Gas Lift Cylinder - Image 1](https://m.media-amazon.com/images/I/61IM5JT+7eL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: The length range is 11.2 inches to 22.5 inches and the adjustable range: 8 inches." This contradicts itself. Can you clarify the max and min length?**
A: Try looking at the correct picture,  you are looking at the measurement of only the shock body which is 11.2. With the shaft fully seated it's 14.5 and fully raised is 22.5, now you've got the 8''.  22.5 - 14.5 = 8  YAAAAAAAAAAAAAAAA.

**Q: Does this fit the aeron chair?**
A: You need to find out the diameter of the old cylinder and check against the new. It seems a pretty standard size for office chairs as far as I can see. Getting the old out and the new in can be hard work as these rely on friction and weight to sit in the base as well as connecting to the seat. There are video's on YouTube. Check Aeron cylinder replacement there and see if anyone has posted

**Q: Does it come with the tool required to remove the old cylinder?**
A: No, there are no tools included with the cylinder. There are instructions online for removal, the technique that I use primarily involves a 2# hammer. If the cylinder is really stuck into the bracket on the seat bottom, you may need a vise and a punch to hammer out the top of the cylinder. Step by step instructions are too long to detail here - search for a video tutorial on YouTube.

**Q: Will it work on this chair to raise it higher than its default? https://www.amazon.com/gp/product/b07s57ccxf  hoping so.**
A: Depends on what size cylinder you are replacing.  I bought this to replace a 4 inch and it was too high.  I bought a 6 inch and it worked fine.  No sagging even with my 250 lbs

## Customer Reviews

### ⭐⭐⭐⭐⭐ I am tall - this does the job
*by R***S on May 20, 2020*

I beat the old one out by whacking it with a sledgehammer. I would not say it was easy but it's no more difficult than any other tube would be to install. The right tools would be a must especially for someone who hasn't done it before. I have a bit of experience assembling chairs (unfortunately!) and so I knew how to get the tube out hitting in the correct spots. For the bottom part of the tube that connects to the legs/casters I turned the chair sideways so the floor was supporting the chair and the legs and then I beat the bottom of the tube out of the legs with a small metal mallet/sledgehammer. After removing the legs, I needed to get the chair off the top of the tube. For the top of the tube I slightly damaged the paint under my chair whacking the metal all around the chair near the top of the tube to try to pop the chair off the tube. I did not whack the tube, only around it with firm strokes parallel to the tube, hitting the base of the chair near the tube's connection, carefully tapping it out. Or actually not very carfully- you do have to whack it good. While whacking I had a good grip on the base of the tube pulling it away from the chair as I whacked the chair. The you put the new tube in the base, carefully align the seat to the top of the tube and set it straight down. Carefully knee it in the middle to make sure it's snug and centered and solid then put some weight on it by sitting. Bounce a bit to get it good and snug. Done. After I got the new tube on, and with the chair upright, you can't see the paint marks that I made, so it's fine for me. Also, like some others, I have trouble getting the thing to activate up and down. Make sure you fully compress the chair seat onto the top of the tube. Bounce your butt square in the middle to get it good and snug. Wiggle and bounce. Then try to activate it, maybe bounce a bit while trying to activate it. I noticed the knobby on the top of this tube is a bit smaller than the knobby on the tube that came with my chair. That's probably why it's difficult to activate. Anyway, once I got it activated and the chair lifted up and I could swing my feet I felt like I was in heaven. I'm 6'2 and I probably am on the longer side of average when it comes to my legs... In other words I have long legs, not short legs. This is important because some tall guys have a longer torso and shorter legs - not drastic enough to notice but definitely enough to matter when it comes to your chair height. Point is that this tube should be fine for most 6'2" guys. However I will say it's just barely enough. I also have 4" wheels on my chair too, so that might be something you need to look into. I bought these and they've been great for me: https://www.amazon.com/gp/product/B00NFQAVZA/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1 I won't need to adjust the chair at all so the adjustment being finicky doesn't bother me. It's amazing to sit at my desk without having to tuck my legs and feet in odd positions.. Five stars because this product, while not perfect, I think it is a good functionality for the price. I hope it lasts!

### ⭐⭐⭐⭐⭐ Great for Big Man and Easier to Install than it looks!
*by D***X on February 20, 2021*

Seems like a high quality product. Just installed today. We'll see! I am 6' 5" tall and just under 300 pounds! This thing raises higher than the blown out cylinder which is a plus. It also accommodates my weight so there is no worry there. I would recommend this item over the competition that comes with gloves and a couple rings (plastic and can break, read others reviews!) that help you pull apart. For the same cost, get this item, a small can of WD 40, and a 14" pipe wrench (that won't break and you can use for something else) all for the same cost or less that the combo thingy. Lube the old cylinder that typically sticks under the seat, with the WD 40, then afterwards, use pipe wrench and viola!. Chair is repaired and you got WD 40 and a pipe wrench. Update: it’s now 3 years later and the thrill is gone. Chair sinks ever so slowly you don’t realize how much until I’ve gotten up and came back to realize the lowered position. About to reorder this one or another brand. Good that I have WD40 and pipe wrench available. 6 May 2024: My new cyclinder came in yesterday and it is the exact one I originally ordered. I was actually pleased with the maker, even though it only lasted 3 years. $20-$25 dollars to get three years is worth it to me. Again, I have all the tools mentioned before and the removal and install processes were the same. I sitting pretty again. Also at the start I am 6'5" and was 280lbs. Same height but now 245 lbs so I should get an extra year (?) We will see.

### ⭐⭐⭐⭐⭐ AWESOME!! Can go higher than the original!
*by S***E on June 30, 2023*

Finally - a chair lift that goes tall enough! I'm 6'1" and about 275 lbs. The original lift on the chair (chair from a big box office store years ago) and one subsequent replacement didn't go high enough. I've been left sitting with legs crossed under the table for years. :( Table is high enough, chair isn't. Well this one will even go *higher than the table*! It says 1" more than usual (6 vs 5 inches), but due to the mount (vs the old lift cylinder) I'm getting closer to 2". Love it!! This one can still go down lower, too, as usual. Haha BUT to get the old lift cylinder out of the chair, it may not be pretty, and here are some tips. FIRST - ESSENTIAL: flip the chair over and spray around 360 degrees where the cylinder goes in (on both ends) with *penetrating oil*, like "PB Blaster" (which rocks BTW - WD40 is NOT penetrating oil - everyone should have a can of PB Blaster on hand), tap the joint to set up vibrations, then let it sit 30 minutes to penetrate. THEN, do it at least one more time. Spray, tap, wait. THEN for the bottom, where the cyclinder goes into the wheels, most effective to whack the bottom of the cylinder with a large rubber mallet. If the bottom of your existing doesn't extend past the bottom of the wheel assembly, try using the mallet on the wheel assembly, or use a large wood dowel to tap on the metal *edge* of the cylinder (not the middle, where the clip is). Also try spraying one more time and letting it sit overnight. Then for the top, where the hydraulic rod goes into the chair, it can be more of a battle if rusted on, as was my case. Use a BIG pipe wrench on the hydraulic rod (which will ruin it by leaving wrench marks on the smooth rod surface, so you need to decide up front that chair is a loss anyway, due to the dead cylinder, so if you can't get the old cylinder out you are replacing the chair anyway. Whack the pipe wrench handle HARD with the mallet, or even a metal "engineers hammer" (mini sledge). In my case that broke the end of the old hydraulic rod loose from the rust after the 3rd hit and out it came. Note that hitting the body of the hydaulic cyclinder to try getting the hydraulic rod out of the chair is likely a really bad idea. Likely pressurized with a big spring in there - don't do it, imho. Wipe the penetrating oil off the holes in the wheel assemply and chair. Even better, use some soapy water on a towel to clean the oil off and dry it. Then drop your new hydraulic cylinder in and away it goes!

## Frequently Bought Together

- DOZYANT 8" Long Stroke Office Chair Gas Lift Cylinder Replacement,Hydraulic Pneumatic Shock Piston Heavy Duty (450 lbs) for Tall Person Universal Size Fits Most Executive Chairs, Highest End Class 4
- MySit Gas Lift Cylinder Removal Tools 28mm/1.1-Inch, Removal Tools Sets for Replace Office Chair Cylinder, Fix Sinking Office Chair Stainless Steel Chair Saver for Stop Sinking - 2 Pieces
- DOZYANT 6" Long Stroke Office Chair Gas Lift Cylinder Replacement,Hydraulic Pneumatic Shock Piston Heavy Duty (450 lbs) for Tall Person Universal Size Fits Most Executive Chairs, Highest End Class 4

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-09-20*