Search  for anything...
Miracle Caster

Miracle Caster! Extra Large Chair Wheels. 4" Set of Five. Great for carpet. Replaces chair mat.

    • Based on 427 reviews
Condition: New
Checking for product changes
$69.94 Why this price?

Buy Now, Pay Later

As low as $11.66 / mo
  • – 6-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout. Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Free shipping on this product

This item is eligible for return within 30 days of receipt

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: In Stock.
Fulfilled by lifeweaver_llc
Arrives Jan 20 – Jan 22
Order within 2 hours and 10 minutes
Available payment plans shown during checkout

Features

  • These large chair casters roll more easily over carpet eliminating the need for a chair mat.
  • Heavy duty. Guaranteed not to fail when used on carpet. (See details below.)
  • Great for heavy individuals, people with mobility problems, or people who need a higher seat.
  • Caster stem is 7/16" diameter. See photos above and description below for other dimensions.
  • Can be fitted to wood chairs & furniture using sockets sold separately. Use Miracle Caster link.

Description

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.


Brand: Miracle Caster


Material: Plastic


Unit Count: 1 Count


Mounting Type: Stem Mount


Load Capacity: 300 Pounds


Item Weight: ‎4.31 pounds


Package Dimensions: ‎7.44 x 7.4 x 6.81 inches


Item model number: ‎MC78


Is Discontinued By Manufacturer: ‎No


Weight: ‎4.2 Pounds


Date First Available: October 2, 2008


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Jan 20 – Jan 22

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Added a badly needed 2" height to my chairs
Bought these as a replacement for the included casters on a pair of computer chairs. Since we couldn't lower the desks, raising the seat height a few inches was a perfect solution.
Reviewed in the United States on July 4, 2023 by Scienda
    • Adds good height, rolls very smooth
I needed to raise my chair a bit to be in a better position at my desk. These work great. I just had to pop my old wheels out and pop these in, and that was it.
Reviewed in the United States on July 24, 2023 by Ada
    • Like rolling on low-pile carpet now.
Don't get me wrong, I just installed these on my chair. I read a lot of reviews saying that the wheels broke their chair. After seeing the size of them, I can understand why. I always have made sure to purchase a chair with a metal star base. All of the reviews showing that theirs broke appear to be plastic, but I didn't confirm everyone I looked at. Having said that, I have what I consider medium-pile carpet. Before putting these wheels on I had to pull my weight out of the seat. Now I just nudge forward, and the chair responds to my movement with me sitting in it. This was important to me because I pivot between 3 workspaces. I'm interested in seeing what it does to my carpet long-term. My plans are to replace the carpet in the future. The area I work in will likely be converted to an engineered wood since I'm in a basement. So far so good though. Could instantly tell a difference in my ability to adjust and also saved me looking into a 500$+ custom chair mat. ... show more
Reviewed in the United States on March 11, 2023 by Chris Stansell
    • a must for carpet
How annoying it is to be punished for enjoying plush carpet by having your office chair fight you when you try to roll it around. These are a great improvement...I wish I could find similar ones but with even larger wheels.
Reviewed in the United States on June 30, 2023 by John Webshopper
    • Watch out for over-sized stem rings - plus 9 years later
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 Alera Ravino Big & Tall Series High-Back Swivel/Tilt Leather Chair, Black , they might be overkill with smaller less sturdy chairs, especially ones without metal legs. ... show more
Reviewed in the United States on November 30, 2011 by Bookie
    • These are outies.
My Steelcase Leap drafting stool has posts on the bottom. These had to be returned because they have posts on them. I didn’t know there were two standards.
Reviewed in the United States on June 18, 2023 by Thomas C. Ingham
    • Perfect fix!
Review Image by Kim Kim
I was looking for a way to raise the height of my office chair to better work with my desk. This was the perfect fix. Incredibly easy to install. They move like a dream. I was worried about the cost but as of right now they are worth every penny!!
Reviewed in the United States on April 22, 2023 by Kim Kim
    • Perfect addition to roll on carpet
I have tried so many types of mats at various times over the years to roll properly on the carpets as I've moved into new places. Nothing worked well. I do not like to feel like I'm sliding around on glass - I like a bit of resistance when I'm in my office chair. That feeling of being in the office on business carpet tiles over concrete is perfect to lean, and shift, and roll, but it's a white whale on home carpeting. The Miracle Casters are what I've needed this entire time. I considered other types of replacement wheels for my chair, but these tall and wide wheels provide a great movement on carpet that I imagine, due to surface area, couldn't happen with any of the other options. I'm a big guy, but my chair base is metal, so I'm not worried about the base cracking other reviews mention. With that said, I can definitely feel the pressure on the spokes as I push around, so if you have a plastic base I could see that being a concern to consider. These are 100% worth the cost. ... show more
Reviewed in the United States on February 6, 2022 by Aaron Near

Can't find a product?

Find it on Amazon first, then paste the link below.