---
product_id: 291011840
title: "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"
brand: "mastery mart"
price: "1793 kr"
currency: DKK
in_stock: true
reviews_count: 8
url: https://www.desertcart.dk/products/291011840-heavy-duty-office-chair-base-replacement-2500-lbs-28-70
store_origin: DK
region: Denmark
---

# Universal 28-inch diameter fits most chairs Reinforced tubular iron with screw assembly Supports up to 2500 lbs load 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

**Brand:** mastery mart
**Price:** 1793 kr
**Availability:** ✅ In Stock

## Summary

> 🪑 Upgrade your throne with unshakable strength and style!

## Quick Answers

- **What is this?** 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 by mastery mart
- **How much does it cost?** 1793 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/291011840-heavy-duty-office-chair-base-replacement-2500-lbs-28-70)

## 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

- • **Cost-Effective Upgrade:** Replace just the base for a fraction of the cost—keep your favorite chair feeling brand new without breaking the bank.
- • **Effortless Installation:** Clear step-by-step instructions make upgrading your chair base a breeze—no professional help required.
- • **Universal Compatibility:** Fits most office, gaming, and executive chairs with standard 7/16" x 7/8" caster stems and 2" gas cylinders—no guesswork needed.
- • **Scratch-Resistant & Safe:** Low center of gravity design prevents wobbling and protects your floors from costly damage.
- • **Unmatched Strength & Stability:** Engineered to support a massive 2500 lbs, ensuring your chair stays rock-solid under pressure.

## Overview

The MASTERY MART Heavy Duty Office Chair Base Replacement is a durable, matte black metal base designed to fit most office and gaming chairs. Measuring 28 inches in diameter, it supports up to 2500 lbs with reinforced tubular iron construction and universal compatibility for standard casters and gas cylinders. This budget-friendly, easy-to-install replacement base enhances chair stability, prevents floor scratches, and extends the life of your favorite chair.

## Description

Full description not available

## Features

- 🥇【Universal Size】This gaming chair base replacement is compatible with most chairs on the market, such as Herman Miller office chairs, gaming chairs, desk chairs, and executive chairs. Fits casters with 7/16" x 7/8" (11 mm x 22 mm) stems and gas cylinders with a 2" (5 cm) diameter.
- 🥇【Durable and Sturdy Materials】This heavy-duty base is made of chrome-plated metal with a matte finish. The solid tubular iron structure is reinforced with screws, providing enhanced load-bearing capacity and safety. It can support up to 2500 lbs.
- 🥇【Ensure Safety and Prevent Scratches】An improper chair height can lead to an unstable center of gravity and floor damage. Our replacement base features a low center of gravity and enhanced stability, making your chair safer and preventing scratches—saving you the cost of buying a new chair.
- 🥇【Budget-Friendly Solution】Why replace the whole chair when you can fix it for 1/5 the cost? If your chair seat is still in good condition, replacing the base is a smart way to save money and keep your favorite chair.
- 🥇【100% Satisfaction Guaranteed】Our replacement base is easy to install with clear, step-by-step instructions. If this doesn't fit your chair, you can simply return it.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | MASTERY MART |
| Color | Matte Black |
| Product Dimensions | 28"D x 28"W x 4"H |
| Size | 28D x 28W x 4H in |
| Back Style | Solid Back |
| Special Feature | 11mm x 22mm, Durable, Easy to Replace and Install, Heave Duty, Quality Guaranteed |
| Product Care Instructions | Wipe Clean |
| Unit Count | 1.0 Count |
| Recommended Uses For Product | Office |
| Maximum Weight Recommendation | 2200 Pounds |
| Style | Contemporary |
| Pattern | Solid |
| Finish Type | Polished |
| Room Type | Office |
| Age Range (Description) | Adult |
| Included Components | Base Only |
| Theme | Contemporary |
| Shape | Round |
| Arm Style | Armless |
| Surface Recommendation | Hard Floor |
| Furniture base movement | Swivel |
| Indoor/Outdoor Usage | Indoor |
| Furniture Finish | Black,Matte |
| Seat Height | 28 Inches |
| Fill Material | Metal |
| Leg Style | Tapered Leg |
| Reclining Position Count | 1 |
| Tilting | No |
| Is Customizable | No |
| Is Foldable | No |
| Form Factor | Metal |
| Manufacturer | Mastery Mart Co., Limited |
| Assembly Instructions Description | Included, Easy to follow |
| Item Weight | 4.95 pounds |
| Item model number | Mastery Mart |
| Weight | 3 Kilograms |

## Product Details

- **Brand:** MASTERY MART
- **Color:** Matte Black
- **Material:** Metal
- **Product Dimensions:** 28"D x 28"W x 4"H
- **Size:** 28D x 28W x 4H in

## Images

![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 - Image 1](https://m.media-amazon.com/images/I/51WVM0Ag+GL.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

### ⭐⭐⭐⭐⭐ Solid Base for Turning Office Chair into 400lb + Big and Tall Chair
*by M***Y on August 28, 2024*

I have a Flexispot C7...awesome ergonomic office chair, until, the plastic base literally split under my big and tall weight. It was rated to 300lbs, and I'm just a bit over that...but, after 8 mos, it failed. So what was I going to do? I played with getting another office chair, rated to heavier weights, but my C7 is pretty darn confortable, I sit for 8-12 hrs per day as I work from home. Then, I found THIS solution. Inexpensive, and rated to 2500...I figured I'd give it a shot. It arrived in less than a week this morning, and 10 mins of simple assembly and my C7 is now ready to roll again! What a great solution to a problem that many of these "normal sized people" office chairs present. Recommend you get the Lifelong Office Chair Wheels Replacement Rubber Chair Casters for Hardwood Floors and Carpet, Set of 5, Heavy Duty Casters for Chairs to Replace Office Chair Mats - Fits 98%...as well, for hardwood floors.

### ⭐⭐⭐⭐⭐ Needed a replacement and got an upgrade!
*by D***E on April 26, 2025*

Good quality base. Assembly is straight forward and had my chair back up and working in less than 5 minutes. Bought this to replace the factory plastic base my chair came with which was starting to crack. Turns out this is a more robust and stronger base than I had. It did add about an inch of height to my chair but not an issue since the chair is adjustable. Easy assembly, works as described and added strength.

### ⭐⭐⭐⭐⭐ Perfect!
*by M***W on May 3, 2023*

I had an office chair with a plastic star base. 1 year and 1 day after I bought it, one of the arms broke where the caster attaches. I was worried I'd have to buy a whole new chair, but looked and found this.The hardest part was getting the old star base off the gas cylinder. if you can't get the old one off, look for a video on youtube where they show you how to remove the clip and take the base off the cylinder. Once I did that, I was able to put it on the ground and whack at the base with a rubber mallet and it dropped off. I had literally hit it 50 times with WD-40 sprayed all in there and it didn't budge, but once I took it off, 2 hits on the old base and it was off.The new base went together perfectly. The five arms have two screws each to attach them to the center. This is much sturdier and a little taller than my old base, so that's nice. Totally worth the purchase!

## 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 Denmark*
*Store origin: DK*
*Last updated: 2026-02-09*