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Your cart is empty.Miracle Casters are large chair casters that offer several advantages over regular chair casters. Miracle Casters use wheels that are nearly 4 inches in diameter. That's twice the diameter of the cheap casters supplied on most office chairs! Because of their larger size, Miracle Casters roll easily over thick carpet and can also be used on tile. Think of the huge wheels on tractors and other heavy equipment. Miracle Casters work on the same principle. The bigger the wheel, the easier it will roll over a soft or uneven surface. Each caster is rated to carry 130 pounds, which means that a set of five will hold a static load of 650 pounds. However, for best results, we do not recommend Miracle Casters for individuals over 300 pounds. When used on carpet, each Miracle Caster is guaranteed against failure for 10 years. Miracle Casters fit many office chairs. PLEASE MEASURE YOUR CURRENT CASTER STEM TO MAKE SURE THE DIAMETER IS 7/16-INCH. A ruler, 7/16" wrench or 7/16" drill bit can be helpful when checking your stem diameter. The length of Miracle Caster stems is 7/8-inch. To avoid chair damage, your current caster stem should be between 7/8-inch and 1.25-inch in length. See photos for complete dimensions. Here's what people are saying: * Received your casters and they seem to be working great. I can move on the rug! - Eilleen H., Harrisburg, PA. * Wanted to let you know that I put the casters on my (Henry Miller) Aeron chair, and omigod they are awesome!!! - Richard H., Los Angeles, CA * Goodbye ugly plastic mat! Your casters went on an Aeron chair, and actually improved an already-excellent product. I've got a pretty bad neurological condition, which causes major pain; the Aeron has helped that, and your casters are little 'miracles' too, making a good product better. I've successfully ordered goods from the Internet for many years, but this is the first time I've felt I should write a company with my compliments. Keep up the good work! Many blessings. - Michael, GA.
Rodney
Reviewed in the United States on February 26, 2025
I got these large wheels to raise my chair up a few inches to be more level with my slightly tall desk and these wheels accomplished this perfectly! A bit pricey but they make me feel like I’ve got a monster truck for a computer chair, I say worth it!
Debbie Smith
Reviewed in the United States on January 30, 2025
These actually work perfectly on carpet! They’re big, but they work!!
jim grose
Reviewed in the United States on July 13, 2024
Somewhat pricey, but more than worth the money! Since retiring to my man cave a few years ago I have been through almost a half dozen different caster designs and sizes and have finally found the best caster set anywhere! Odd looking but extremely versatile, these "Big Wheels" check off all the boxes. They fit perfectly, rotate smoothly and roll quietly over all of the surfaces that I have tried them on. In addition, they add a little more than an inch for tall users and do not strain under the weight of a large man, like me. No matter what chair I might purchase in the future, these are the only casters I will ever use! You cannot go wrong with these Big Wheels!
Randen L. Pederson
Reviewed in the United States on December 17, 2024
I'm a bit overweight so the small wheels that come with a chair dig in to the mat too much. These make gliding over the mat easier.
A Okhai
Reviewed in the United Kingdom on May 13, 2023
What an upgrade / improvement. Expensive. But highly recommended.
RUPERT ASHTON
Reviewed in the United States on September 22, 2022
These are everything claimed, Worth the price even with shipping to NZThese work supurbly on my desk rug on carpet. They're very gentle on both with their large surface area, roll easily and raise the chair base nicely offering lots of clearence for my old hanging out the bottom cylinder which was previously catching on the rugPurchased to replace office oasis blade, which were purchased to replace stock Aeron carpet castors. The blade style castors helped things one way by lifting the base, but crushed, and mangled the rug badly due to their small contact surface area. The Miracle castors are really comfortable, and feel very solid so far. They are biigg and make the chair somehow look more imposing.. but I like that too
J. Goh
Reviewed in Canada on August 23, 2022
The old wheels on my Aeron were dying, and I moved to a place where my chair was on a medium depth carpet, and I was basically immobile.I did some research and found out that those rollerblade-style wheels that are extremely popular and prevalent aren't necessarily super good on carpet, so I took a chance on these.10/10, would recommend. Definitely what you're looking for with carpeted floors.I've seen the reviews saying that the larger wheels may strain the base of the chair. This is not a problem on the Aeron, which has a metal base.
Lorne
Reviewed in Canada on November 30, 2021
Work pretty good on carpet.
Mark R.
Reviewed in Canada on May 18, 2018
Second purchase, so obviously satisfied.Excellent ! Very heavy, so I assume sturdy. Roll way more easily than 2" wheels, and don't make the shallow indentations in my chair mat that caused me to buy these expensive wheels. Also worked well directly on our low-pile industrial carpet. Boosted my chair height by a very useful 2 inches, because the maximum seat height was not quite high enough, before.
EVGA Classic SR2
Reviewed in Canada on August 5, 2017
These wheels are fantastic.....I have them on an aluminum frame and they roll along on my rug covered floor covered with a heavy plastic surface with no problems at all....My friend has a chair with 3 inch ... I have also installed anti-static strips on both mats so there are no static surprises with electical jolts... worked out great...!!!
Bookie
Reviewed in the United States on November 30, 2011
Edit May 2022:Bought these and chair again in August '13 after a long-distance move, and both still going strong—so they definitely deserve 5 stars for longevity under a big heavy guy!Edit July 2013:These casters are still working perfectly on the Ravino chair nearly two years later. I am now ahead financially, having saved on two mat replacements, and that looks set to continue. Perfect rolling action, zero problems--this is a top-class product.I was ready to change my rating to five stars if the seller had updated their FAQ page to address the issues expressed here over the years. But no, they haven't--so I haven't. Great product let down by inattentive seller.Original review September 2011:Installed these yesterday after my chair mat almost succeeded in stabbing me with another broken shard of hard plastic. Fine casters so far, moving well on standard office carpet.I deducted a star after experiencing installation problems, and not finding a scrap of help on the seller's website. Seller, you already have a questions page, I recommend you include answers to some of the questions or issues raised in these reviews.First caster installed fine with strong hand pressure--as did the fourth, later. Second didn't, but eventually went in with some light tapping from a small hammer. However, this didn't work with the third [or fifth] caster, and I wasn't about to start any serious hammering. I tried different casters on different chair legs, in case it might be an issue of two maximum machining tolerances causing a failure.Getting the first two casters in suggested it wasn't the main caster stem which was the issue, and led me to quickly identify the problem as badly shaped metal rings in the groove at the head of the caster stem--they were jutting out too far beyond the diamater of the stem. They are very strong rings, I couldn't squeeze them smaller with a needle-nose pliers.I went with the easier solution of prying off the problem rings, and then using the rings from the old casters in their place. These other rings were a little more flexible, I was able to shape them with the pliers both to open [to get them on the stem] and finally close them a little. Miracle Casters popped in fine after doing this.The function of the rings seems to be to hold the casters in the chair leg, without one the caster was totally free to slide on and off the leg. I'm only guessing that you could use the casters just fine without the rings, but they'd fall off if you lifted the chair--not too big an occasional deal for most people, probably.Fyi, I'm using these casters with , they might be overkill with smaller less sturdy chairs, especially ones without metal legs.
L. Simon
Reviewed in the United States on May 19, 2010
I recently replaced a smaller task chair with a larger executive chair in my den. I work at home so I spend a lot of time in the chair. The new chair is much heavier and wouldn't budge on the carpet while I was sitting in it. Even when I was out of the chair it was a little stiff to move.These casters made a huge difference. I can roll around and move the chair making it much easier to use. The chair still doesn't roll like a chair on a hard floor but I didn't have the expectation that it would. These casters are twice the height of most casters so they look huge at first but I've gotten use to the look. They also lift your chair up 2" so I now use it at the lowest height setting instead of raising it a little. While these were bit expensive they did what I'd hoped for and they were worth it to me.I'll add that we have very dense short pile carpeting in our den. It is much softer and a bit thicker than what I would call "office" carpeting but shorter and denser than the carpeting we have in the rest of the house.
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