---
product_id: 176752688
title: "Mastery Mart Office Chair Base Replacement for Office/Desk/Swivel Chair with Cap, Universal Gas Cylinder Socket and Caster Sockets, 28\"(70 cm) Heavy Duty 2200 Lbs/1000 Kg (Matte Black)"
brand: "mastery mart"
price: "€ 429.75"
currency: EUR
in_stock: true
reviews_count: 10
category: "Mastery Mart"
url: https://www.desertcart.de/products/176752688-mastery-mart-office-chair-base-replacement-for-office-desk-swivel
store_origin: DE
region: Germany
---

# 28-inch universal diameter fit Standard 2-inch gas cylinder socket 2200 lbs heavy-duty load capacity Mastery Mart Office Chair Base Replacement for Office/Desk/Swivel Chair with Cap, Universal Gas Cylinder Socket and Caster Sockets, 28"(70 cm) Heavy Duty 2200 Lbs/1000 Kg (Matte Black)

**Brand:** mastery mart
**Price:** € 429.75
**Availability:** ✅ In Stock

## Summary

> 🪑 Upgrade your throne with rock-solid confidence!

## Quick Answers

- **What is this?** Mastery Mart Office Chair Base Replacement for Office/Desk/Swivel Chair with Cap, Universal Gas Cylinder Socket and Caster Sockets, 28"(70 cm) Heavy Duty 2200 Lbs/1000 Kg (Matte Black) by mastery mart
- **How much does it cost?** € 429.75 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.de](https://www.desertcart.de/products/176752688-mastery-mart-office-chair-base-replacement-for-office-desk-swivel)

## Best For

- mastery mart enthusiasts

## Why This Product

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

## Key Features

- • **Reliable Stability:** Precision-engineered spokes and hub ensure zero wobble, delivering a solid foundation for daily grind.
- • **Effortless Assembly:** Quick 15-minute setup with included hex bolts and wrench—get back to work faster.
- • **Universal Compatibility:** Fits almost every office, gaming, and swivel chair with standard 2-inch gas cylinder and caster sockets.
- • **Sleek Matte Black Finish:** Modern, low-profile design that elevates your workspace aesthetics while resisting wear.
- • **Built to Endure Heavy Use:** Supports up to 2200 lbs (1000 kg) with premium-grade reinforced metal for unmatched durability.

## Overview

The Mastery Mart Office Chair Base Replacement is a heavy-duty, matte black metal base designed to support up to 2200 lbs. With a universal 28-inch diameter and standard 2-inch gas cylinder socket, it fits most office and gaming chairs. Engineered for durability and stability, it features a sleek design and easy assembly, making it the ultimate upgrade from fragile plastic bases.

## Description

Mastery Mart Office Chair Base Replacement for Office/Desk/Swivel Chair with Cap, Universal Gas Cylinder Socket and Caster Sockets, 28"(70 cm) Heavy Duty 2200 Lbs/1000 Kg (Matte Black) : desertcart.co.uk: Home & Kitchen

Review: Metal Chair Base - Bought as a replacement for the ABS plastic base on my chair. The black metal low profile base comes in a shoebox sized package. Assembly is required. There are 5 spokes, a central Hub, and a cosmetic plastic cover. All parts are individually plastic wrapped to protect the powder coat. Also supplied is a packet of m6 hex bolts and an allen key/hex wrench. There is only one way a spoke will fit on the hub and the spokes are identical. My hub had two drilled holes per spoke but only the one closest to the center had threads to receive the bolt. There is a reasonable friction fit on the spokes so take care to align the the holes for the bolts when sliding the spoke onto the hub as it may take a little bit of force to move it around. Base is exactly the same size and height as the plastic one it replaced. Center opening is a standard 2"/50mm and my gas lift fit perfectly. No wheels were supplied but again the spokes have sockets for a standard 11mm caster and the wheels from the original base fit perfectly. Assembly was straightforward and took about 15 minutes. It was delivered at 12.30 and I was sat in my chair writing this review by 1pm. Reassembling the Chair was straightforward (!! remember to put the plastic cover on the gas strut first!)! Probably the most difficult bit was pulling the wheels off the old base.(firm grip and steady pull while twisting) My immediate impression is that it feels solid and sturdy. It seems well made with clean looking welds. I'm a big fella and use my chair daily. If anything goes wrong I'll be back here to tell you about it. Tip. Check on the hex bolts after a week or so, and regularly after that as they will almost certainly loosen over time. Tape the allen key to the bottom of the chair so it is handy if you need it.
Review: Reassuringly well made - I bought this steel replacement for a plastic cheapie which was fitted to my Melokea S1 chair, this failed after only 6 months use, despite it claiming to be "heavy duty". I was tempted to go for a one-piece aluminium part, but the one I was looking at was only rated for 400 lbs, whereas this one is 2400! The package is neatly packed and fits very precisely together, 5 Allen keyed bolts holding the legs onto the very solid steel central part. Took no more than 5 mins to put together, but don't forget to put the plastic guard over the end of the seat post BEFORE fitting the post into the base, as once you've sat on it, it's difficult to remove!! There is no hint of movement in the legs themselves once the Allen keys are fitted, given the quality of the steelwork and the precision with which they fit together, I can see why this item is relatively expensive (I paid £43) but over all I think the product is good value for money. If only chair manufacturers fitted decent bases in the first place..... but I guess this would make them a lot more expensive. I'll certainly never buy a chair with plastic base again, particularly now I have this metal one! I went for a nice set of soft rolling double castors as well, much nicer than the originals. So OK I have spent as much repairing the chair as it originally cost, but at least I know the base won't fail!

## Features

- WHAT'S IN THE BOX: 1 Set of Office Chair Black Base *************************************************************, Installation Package, 1 Base Cap.
- PREMIUM GRADE METAL MADE STRONG BASE *************************************************************: This Heavy Duty Chrome Base Stool is manufactured to meet the Office Chair's highest industry standard (BIFMA and ANSI). The reinforced metal and durability of the base will ensure your chair's base is firmly sound for many years.
- UNIVERSAL SIZE: The office chair base works perfectly with almost every office chair, gaming chair, desk chair, task chair and swivel chair on the market. The office chair base ************************************************************* has universal sockets that will fit your original casters and gas lift cylinder.
- SIZE DETAIL: Office Chair Base Size in Diameter: 28’’ (70 cm). Chrome Base Leg Length: 12.6’’ (32 cm). Standard Gas Cylinder Socket: 2’’ (5 cm). Standard Caster Sockets: 7/16’’ x 7/8’’ (11mm x 22mm). Height of the Chrome Base: 4’’ (10 cm)
- 100% SATISFACTION ************************************************************* - Very easy installation and ************************************************************* with our simple and clear instruction sheet. If this doesn't fit your chair, you can simply ************************************************************* it for a full *************************************************************.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07ZY36NJ1 |
| Assembly type | Require Assembly |
| Best Sellers Rank | 63,109 in Home & Kitchen ( See Top 100 in Home & Kitchen ) 230 in Desk Chairs |
| Capacity | 70D x 70W x 10H cm |
| Care Instructions | Wipe Clean |
| Colour | Black |
| Customer Reviews | 4.7 4.7 out of 5 stars (2,054) |
| Date First Available | 3 Nov. 2019 |
| Finish type | Matte |
| Is assembly required | Yes |
| Item Model Number | Mastery Mart |
| Item model number | Mastery Mart |
| Item shape | Round |
| Manufacturer | Mastery Mart Co., Limited |
| Mattress comfort | Recliner |
| Number of boxes | 1 |
| Number of pieces | 1 |
| Primary material | Metal |
| Product Dimensions | 70 x 70 x 10 cm; 2.25 kg |
| Seat height | 28 Inches |
| Shipping weight | 2.9 Kilograms |
| Style | Contemporary |
| Top material | Metal |
| Type of wood | Metal |
| What is in the box? | Caster |

## Product Details

- **Brand:** MASTERY MART
- **Colour:** Black
- **Material:** Metal
- **Product dimensions:** 70D x 70W x 10H centimetres
- **Size:** 70D x 70W x 10H cm

## Images

![Mastery Mart Office Chair Base Replacement for Office/Desk/Swivel Chair with Cap, Universal Gas Cylinder Socket and Caster Sockets, 28"(70 cm) Heavy Duty 2200 Lbs/1000 Kg (Matte Black) - Image 1](https://m.media-amazon.com/images/I/51WVM0Ag+GL.jpg)
![Mastery Mart Office Chair Base Replacement for Office/Desk/Swivel Chair with Cap, Universal Gas Cylinder Socket and Caster Sockets, 28"(70 cm) Heavy Duty 2200 Lbs/1000 Kg (Matte Black) - Image 2](https://m.media-amazon.com/images/I/71Pv1f4UxzS.jpg)
![Mastery Mart Office Chair Base Replacement for Office/Desk/Swivel Chair with Cap, Universal Gas Cylinder Socket and Caster Sockets, 28"(70 cm) Heavy Duty 2200 Lbs/1000 Kg (Matte Black) - Image 3](https://m.media-amazon.com/images/I/61lyPEj9euL.jpg)
![Mastery Mart Office Chair Base Replacement for Office/Desk/Swivel Chair with Cap, Universal Gas Cylinder Socket and Caster Sockets, 28"(70 cm) Heavy Duty 2200 Lbs/1000 Kg (Matte Black) - Image 4](https://m.media-amazon.com/images/I/61TE6JnVcTS.jpg)
![Mastery Mart Office Chair Base Replacement for Office/Desk/Swivel Chair with Cap, Universal Gas Cylinder Socket and Caster Sockets, 28"(70 cm) Heavy Duty 2200 Lbs/1000 Kg (Matte Black) - Image 5](https://m.media-amazon.com/images/I/61kIXwFKfhS.jpg)

## Available Options

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

## Questions & Answers

**Q: Would this work as a replacement base for a DXRacer king series chair?**
A: It's a standard diameter so yes. I've replaced the base on an x-rocker chair, and it made an immediate improvement

**Q: Hi, i bought homcom pu leather office w/massage function, high back-red &the base's gone - split into 2. would this one be suitable as a replacement?**
A: yes it would

**Q: Struggling to remove the old base from my old is it possible that the base and cylinder is one piece?**
A: I know this is a very old comment but for anyone else who might see it, the cylinder can be hard to remove.
There's many YouTube videos about it but what worked for me with a really stubborn one was having half the legs of the base on the side of a bed and hammering the cylinder directly from the bottom, hard. 
I'd spent 10 minutes trying other methods but this eventually worked.

**Q: I have a gas lift that starts off 40cm then expands to 50cm. I'm unsure if this base will work with this or not?**
A: This 'spider' like all these seat bases are universal; I ordered mine as a replacement for a defective existing base it fitted and worked very well.  You should have no problems.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Metal Chair Base
*by F***L on 9 June 2025*

Bought as a replacement for the ABS plastic base on my chair. The black metal low profile base comes in a shoebox sized package. Assembly is required. There are 5 spokes, a central Hub, and a cosmetic plastic cover. All parts are individually plastic wrapped to protect the powder coat. Also supplied is a packet of m6 hex bolts and an allen key/hex wrench. There is only one way a spoke will fit on the hub and the spokes are identical. My hub had two drilled holes per spoke but only the one closest to the center had threads to receive the bolt. There is a reasonable friction fit on the spokes so take care to align the the holes for the bolts when sliding the spoke onto the hub as it may take a little bit of force to move it around. Base is exactly the same size and height as the plastic one it replaced. Center opening is a standard 2"/50mm and my gas lift fit perfectly. No wheels were supplied but again the spokes have sockets for a standard 11mm caster and the wheels from the original base fit perfectly. Assembly was straightforward and took about 15 minutes. It was delivered at 12.30 and I was sat in my chair writing this review by 1pm. Reassembling the Chair was straightforward (!! remember to put the plastic cover on the gas strut first!)! Probably the most difficult bit was pulling the wheels off the old base.(firm grip and steady pull while twisting) My immediate impression is that it feels solid and sturdy. It seems well made with clean looking welds. I'm a big fella and use my chair daily. If anything goes wrong I'll be back here to tell you about it. Tip. Check on the hex bolts after a week or so, and regularly after that as they will almost certainly loosen over time. Tape the allen key to the bottom of the chair so it is handy if you need it.

### ⭐⭐⭐⭐⭐ Reassuringly well made
*by P***B on 30 November 2024*

I bought this steel replacement for a plastic cheapie which was fitted to my Melokea S1 chair, this failed after only 6 months use, despite it claiming to be "heavy duty". I was tempted to go for a one-piece aluminium part, but the one I was looking at was only rated for 400 lbs, whereas this one is 2400! The package is neatly packed and fits very precisely together, 5 Allen keyed bolts holding the legs onto the very solid steel central part. Took no more than 5 mins to put together, but don't forget to put the plastic guard over the end of the seat post BEFORE fitting the post into the base, as once you've sat on it, it's difficult to remove!! There is no hint of movement in the legs themselves once the Allen keys are fitted, given the quality of the steelwork and the precision with which they fit together, I can see why this item is relatively expensive (I paid £43) but over all I think the product is good value for money. If only chair manufacturers fitted decent bases in the first place..... but I guess this would make them a lot more expensive. I'll certainly never buy a chair with plastic base again, particularly now I have this metal one! I went for a nice set of soft rolling double castors as well, much nicer than the originals. So OK I have spent as much repairing the chair as it originally cost, but at least I know the base won't fail!

### ⭐⭐⭐⭐⭐ Fantastic Item!
*by A***. on 12 April 2024*

I bought an AK Racing brand chair nearly two years ago for just over £300 from a nearby Computer Shop. Last week one of the plastic legs broke off taking the castor with it. I wasn't happy with taking a perfectly good chair to be recycled due to one failure and I was unsure as to the manufacturers warranty or if it even applied. After looking at Amazon on the remote chance I could buy a replacement base, I came across this fantastic 'universal' base. The new base arrived in a shoebox sized package and took less than five minutes to assemble. What do I like about it? The legs on this base are made out of metal, my existing wheels / castors fitted perfectly and the base's centre hole is the standard 50 mm bore which matches most, if not all, chair piston diameters. As for removing the original base from my chair? That took about an hour of hacksaw and mallet work! Right now, my AKRacing chair with this new base fitted is sturdier and more solid than it originally was, probably due to the metal legs. Overall, i'm very happy.

## Frequently Bought Together

- MASTERY MART Heavy Duty Office Chair Base Replacement, 2500 Lbs, 28"(70 cm), Metal Desk Chair Base Replacement Parts with Universal Gas Cylinder Hole and Casters Sockets, Matte Black
- Office Chair Caster Wheels Set of 5 Heavy Duty & Safe for All Floors Including Hardwood 2" Rubber Replace Office Chair Mat, Universal Standard Stem Size Fits 99%-Grey
- 9 Inches to 13 Inches Office Chair Cylinder Replacement, 4'' Stroke, Heavy Duty 1000 lbs, Hydraulic Pneumatic Shock Piston, Universal Gas Cylinder Fit for Most Office Chairs, Class 4 (Polished Steel)

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*Product available on Desertcart Germany*
*Store origin: DE*
*Last updated: 2026-03-12*