MASTERY MART 28" Heavy Duty Office Chair Replacement Base (2400Lbs), Office Chair Base Replacement with Universal Caster and Gas Cylinder Size, Matte Black

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.

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!

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.

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.

Good build quality and worth it

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)

Replacement base to repair broken part on gaming chair. Now as new. Easy to assembly, strong material, remember to put on the plastic cover before pushing in the gas lift.

This has done exactly what I needed it to and worked perfectly with new wheels and a new gas cylinder. It was very easy to put together and is incredibly sturdy. Not much more I really need to say about this. It's brilliant and definitely worth the money.

Se ve que estos soportes son soldados a mano, por las malas reseñas que vi yo creo que mejoraron la forma en la que hacen las soldaduras porque se ven mejor hechas cerca de todos los ángulos

My original canada computers chair had a base that was very poor quality and eventually snapped (I'm only 170lbs!) This base replacement allowed me to keep using the chair and it is MUCH sturdier and of a higher quality than the canada computers base, this is a great purchase if you need a replacement base, highly recommended!

So far so good, original plastic failed on one chair, cracked and the post punched through and damaged the floor. This one should never do that, seems well made and sturdy.

bought a new computer gaming chair 2 years ago and the stand/legs it came with were garbage, the base of the chair was touching the floor and the chair was off balance. the company when i contacted them could only suggest to buy a new chair and offered a small discount. I ended up taking the chance and buying this. best decision i made, replaced the old legs with this heavy duty and super strong base. definitely worth the fix! had it now for many months and no issues

Strong and fits perfectly under my Tempur-Pedic office chair. Excellent.