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)

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.

My lad is quite a substantial young gentlemen and is prone to small repeated movements when sat down and when he went to University he quickly broke the large office chair he taken with him that we had bought for him. The plastic chair base breaking in a couple of places with stress cracks. I bought a cast aluminium base to rebuild the chair with and that lasted about 9 months before again he managed to stress crack it into breaking - no I'd never seen that before either! Anyway this purchase was my final attempt at finding a decent chair base that might go the distance, and it has worked a treat. It was easy to fit castors to (also heavy duty!) and easy to mount the rest of the chair too. Its certainly taken everything he has thrown at it for the last 2+ years and has returned home with him for continued use. I also thing its pretty good to look at too, better than the more cumbersome looking plastic bases.

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!

A solid base. Fits standard sized castors, so just swapped them over from the old one. Centre hole slightly under sized, but not a big problem.Self assembly a little fiddly and took about 10 minutes from unboxing to using the chair. After a month, works just fine and still looks shiny. Being a lump of metal, likely to last a lot longer than the original moulded plastic.

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.

Great replacement for my RAZER Tarok PRO Gaming Chair. The chair sits a bit higher now but at least the base won’t snap and result in the gas lift cylinder scraping on the floor.

Here’s a polished version of your review:---I’ve attached before and after pictures for reference. I purchased this product to replace the base of my Xrocker gaming chair, and I’m very pleased with the results. The setup was straightforward, and the new base fit perfectly, including the wheels, which installed without any issues. The chair feels sturdy and looks like it was designed specifically for gaming. I’m giving it 5 stars for now, but I’ll update this review if I encounter any problems down the line.

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.