---
product_id: 177678013
title: "MASTERY MART Office Chair Base Replacement, 28 Inch Heavy Duty 2500Lbs Metal Leg, Reinforced for Swivel Gaming Chair, Universal Caster and Gas Cylinder Size, Polished Steel"
brand: "mastery mart"
price: "$721.89"
currency: USD
in_stock: true
reviews_count: 11
category: "Mastery Mart"
url: https://www.desertcart.ec/products/177678013-mastery-mart-office-chair-base-replacement-28-inch-heavy-duty
store_origin: EC
region: Ecuador
---

# 28-inch universal diameter fit 2500 lbs heavy-duty metal strength Fits standard 2-inch gas cylinder & casters MASTERY MART Office Chair Base Replacement, 28 Inch Heavy Duty 2500Lbs Metal Leg, Reinforced for Swivel Gaming Chair, Universal Caster and Gas Cylinder Size, Polished Steel

**Brand:** mastery mart
**Price:** $721.89
**Availability:** ✅ In Stock

## Summary

> 🪑 Upgrade your throne with steel-strong confidence!

## Quick Answers

- **What is this?** MASTERY MART Office Chair Base Replacement, 28 Inch Heavy Duty 2500Lbs Metal Leg, Reinforced for Swivel Gaming Chair, Universal Caster and Gas Cylinder Size, Polished Steel by mastery mart
- **How much does it cost?** $721.89 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/177678013-mastery-mart-office-chair-base-replacement-28-inch-heavy-duty)

## 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

- • **Unmatched Durability:** Engineered with premium-grade polished steel to support up to 2500 lbs—built to outlast plastic bases and keep you confidently seated.
- • **Effortless Installation:** Quick 15-minute assembly with included hex bolts and wrench—get your chair back in action without hassle or downtime.
- • **Peace of Mind Guarantee:** Backed by a satisfaction promise and easy returns—upgrade your chair base risk-free and join thousands of professionals who refuse to settle.
- • **Universal Compatibility:** Seamlessly fits almost every office, gaming, or swivel chair with standard 28-inch diameter and universal caster/gas lift sockets—no guesswork needed.
- • **Sleek Polished Steel Finish:** Modern, reflective chrome look elevates your workspace aesthetics while resisting wear and tear.

## Overview

The MASTERY MART Office Chair Base Replacement is a heavy-duty, polished steel base designed to support up to 2500 lbs. Measuring 28 inches in diameter, it universally fits most office and gaming chairs with standard 2-inch gas cylinders and caster sockets. Easy to assemble with included hardware, it offers a durable, sleek alternative to plastic bases, ensuring long-lasting stability and style for your workspace.

## Description

MASTERY MART Office Chair Base Replacement, 28 Inch Heavy Duty 2500Lbs Metal Leg, Reinforced for Swivel Gaming Chair, Universal Caster and Gas Cylinder Size, Polished Steel : 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 Silver Base Replacement, Installation Package, 1 Base Cap.
- ➤ PREMIUM GRADE METAL MADE STRONG BASE REPLACEMENT: This Heavy Duty Chrome Base Stool is manufactured to meet the Office Chair's highest industry standard. 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 replacement 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 GUARANTEED - Very easy installation and replacement with our simple and clear instruction sheet. If this doesn't fit your chair, you can simply return it for a full refund.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07ZY3TZCQ |
| Assembly type | Require Assembly |
| Best Sellers Rank | 76,452 in Home & Kitchen ( See Top 100 in Home & Kitchen ) 289 in Desk Chairs |
| Capacity | 28D x 28W x 4H in |
| Care Instructions | Wipe Clean |
| Colour | Polished Steel |
| Customer Reviews | 4.7 4.7 out of 5 stars (2,021) |
| Date First Available | 19 July 2019 |
| Finish type | Polished |
| Is assembly required | No |
| Item Model Number | MM-REP-BAS001-CH-EU |
| Item model number | MM-REP-BAS001-CH-EU |
| Item shape | Round |
| Manufacturer | Mastery Mart Inc. |
| Mattress comfort | Swivel |
| Number of boxes | 1 |
| Number of pieces | 1 |
| Primary material | Metal |
| Product Dimensions | 70 x 70 x 10 cm; 2 kg |
| Seat height | 28 Inches |
| Shipping weight | 3.16 Kilograms |
| Style | Modern |
| Type of wood | Metal |
| What is in the box? | Office Chair Base |

## Product Details

- **Brand:** MASTERY MART
- **Colour:** Polished Steel
- **Material:** Metal
- **Product dimensions:** 70D x 70W x 10H centimetres
- **Size:** 28D x 28W x 4H in

## Images

![MASTERY MART Office Chair Base Replacement, 28 Inch Heavy Duty 2500Lbs Metal Leg, Reinforced for Swivel Gaming Chair, Universal Caster and Gas Cylinder Size, Polished Steel - Image 1](https://m.media-amazon.com/images/I/51xVt7KLnNL.jpg)

## Available Options

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

## Questions & Answers

**Q: How secure is the base of the office chair? Does it have a locking mechanism and sturdy back support?**
A: The office chair base is designed with safety in mind. It features a reliable locking mechanism to keep the base stable and secure, along with sturdy base support to prevent accidental tilting or damage, ensuring your safety during use.

**Q: What materials are used in the construction of the office chair base? Is it sturdy and durable?**
A: The office chair base is made from high-quality materials to ensure it is sturdy up to max capacitu of 2500 LBs and durable, avoiding any cheap feel. Every component undergoes strict quality control, providing reliable support that lasts long-term.

**Q: Is the office chair base easy to assemble? Does it come with an installation guide and tools?**
A: Yes, the office chair base is designed for easy assembly. It comes with a clear installation guide and all necessary tools, making it simple to replace your existing base—even if you have no prior experience.

**Q: How stable is the office chair base? Can it adapt to different floor surfaces?**
A: The office chair base is designed for excellent stability, minimizing the risk of tipping. Whether on tile, hardwood, or carpet, it adapts well to various floor types, providing steady support in any environment.

**Q: Is the office chair base easy to clean and maintain? Does it require special tools?**
A: Yes, the office chair base is designed for easy cleaning and maintenance. Its simple design means no special tools or complicated steps are needed, allowing you to keep the base in great condition with minimal effort.

## 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!

### ⭐⭐⭐⭐⭐ Really well made
*by M***S on 26 October 2024*

When this turned up as a small self assembly kit I was dubious that it would meet expectations; surprisingly after assembly the chair base was very sturdy and strong and I am really pleased with it. If I ever needed a replacement chair base again I would be choosing this! Great value for money, easy assembly, looks great and it works really well.

## Frequently Bought Together

- Mastery Mart Office Chair Base Replacement, 28 Inch Heavy Duty(2500 Lbs) Metal Leg, Reinforced to Repair Swivel Gaming Chair Bottom Part with Universal Caster and Gas Cylinder Size (Silver)
- Mastery Mart Office Chair Caster Wheels for Hardwood Floors, Heavy Duty and Quiet Smooth Rollerblade Wheels for Office Chair, Universal Size (11x22mm), Suitable for Most Chairs
- 9 Inches to 13 Inches Office Chair Cylinder Replacement, 4" Stroke, Heavy Duty 1000lbs, Hydraulic Pneumatic Shock Piston, Universal Fit for Most Office Chairs, Class 4, Polished Steel

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*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-02-22*