--- product_id: 177678013 title: "– 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: "$328.50" currency: USD in_stock: true reviews_count: 10 category: "Mastery Mart" url: https://www.desertcart.us/products/177678013-office-chair-base-replacement-28-inch-heavy-duty-2500lbs-metal store_origin: US region: United States of America --- # Supports up to 2500 lbs load 28-inch heavy-duty metal base Universal fit for casters & gas cylinders – 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:** $328.50 **Availability:** βœ… In Stock ## Summary > πŸ’Ό Upgrade your throne with unshakable strength and style! ## Quick Answers - **What is this?** – 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?** $328.50 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/177678013-office-chair-base-replacement-28-inch-heavy-duty-2500lbs-metal) ## 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 - β€’ **Built to Endure:** Reinforced polished steel base engineered for unmatched durability and stability. - β€’ **Effortless Upgrade:** Simple 15-minute assembly with included hex wrench and boltsβ€”no hassle, just solid support. - β€’ **Heavyweight Champion:** Supports an impressive 2500 lbs capacity, perfect for professionals who demand strength. - β€’ **Sleek & Professional:** Polished steel finish adds a modern, premium look to your workspace setup. - β€’ **Seamless Compatibility:** Universal sockets fit almost every office, gaming, or swivel chair effortlessly. ## Overview The MASTERY MART Office Chair Base Replacement is a 28-inch polished steel base designed to support up to 2500 lbs. It features universal caster and gas cylinder sockets for compatibility with most office and gaming chairs. Engineered for durability and easy installation, this heavy-duty metal base offers a sleek, professional upgrade to your workspace seating. ## 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 Β£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 - ➀ WHAT'S IN THE BOX: 1 Set of Office Chair Silver Base Replacement, Installation Package, 1 Base Cap. - ➀ 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. - ➀ 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. - ➀ 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) - ➀ 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 | 88,669 in Home & Kitchen ( See Top 100 in Home & Kitchen ) 313 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 (2,072) | | Date First Available | 19 July 2019 | | Finish type | Polished Steel | | Is assembly required | No | | Item Model Number | CHAIR | | Item model number | CHAIR | | 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 ![– 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 baseβ€”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 Β£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! ### ⭐⭐⭐⭐⭐ Buy this when you have had enough of the "heavy duty" plastic bases. *by D***K on 24 March 2026* Nice strong base, easy to assemble. Price is high compared to the heavy duty plastic. When you have had 2 heavy duty plastic bases break in 12 months due to stress fractures, you start to understand the price differences. (I have a tilt high back office chair 1970s era and very heavy) ## 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 --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/177678013-office-chair-base-replacement-28-inch-heavy-duty-2500lbs-metal](https://www.desertcart.us/products/177678013-office-chair-base-replacement-28-inch-heavy-duty-2500lbs-metal) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-11*