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Premium Office Chair Stool Conversion Kit with Foot Ring – Extended Height

$11999

Delivery and Shipping

Chair parts typically ship in 1-3 business days via FedEx Ground. All part prices include shipping within the continental United States.

You will receive an email with tracking information as soon as your chair ships.

Chair parts pickup at our Greenville, MI facility is always an option, reach out to our team for more information.

Buying in Bulk?

Looking to purchase gas cylinders and other chair parts in large quantities?

Click Here to get a discounted chair parts quote for purchasing in quantity.

Installation Instructions

Installing your replacement office chair casters is a very quick and simple process, outlined in the video below:

Cylinder Fit Disclaimer

Due to the variety of chair models, gas cylinders, and bases, we guarantee a compatible fit for your selected chair. However, the seat height adjustment range may differ slightly from your current cylinder, and your cylinder may look different than the pictured cylinder.

Description

A replacement gas cylinder fixes sinking office chairs and restores height adjustment, extending your chair’s life without needing a full replacement.

  • Heavy-Duty Construction: Crafted from high-quality steel with precision engineering for enhanced durability and long-term reliability.
  • Extended (Tall) Height: Stool height gas cylinder increases chair height, perfect for standing desks and elevated surfaces.
  • Adjustable Height Range: Offers a smooth height adjustment of 7-8 inches, allowing for personalized seating comfort.
  • Smooth Performance: Gas lift provides quiet and consistent up-and-down movement for improved ergonomics.
  • Easy Installation: Comes with detailed instructions for quick and hassle-free installation. We recommend a large pipe wrench for installation.
  • Warranty: Backed by a 2-year warranty for added peace of mind.

We offer a wide range of gas cylinders to fit various office chairs. Simply select your chair model from the dropdown, and we'll ensure you receive the correct cylinder for your chair.

Specifications

  • Weight Capacity
    -
  • Warranty
    2 Years

Reviews (32)

Customer Reviews

Based on 32 reviews
88%
(28)
3%
(1)
0%
(0)
9%
(3)
0%
(0)
C
Carlo
Herman Miller Aeron 8" Top Activated Stool Conversion Kit

Never worked on office furniture before at all, but with the description and the Videos on YouTube I was able to convert my Aeron to a stool, no problem. Like the videos showed, my 10 year old chair cylinder fitted TIGHT and I did need to get a bigger pipe wrench to get the job done, but I'm sitting happy and comfy now using only the video for instructions (and the Crandall folks seem to be very cool people, it shows).



A suggestion: Maybe go through your kits in the online store and link or embed the appropriate install video? It really gave me the confidence I could do it myself so that probably would help people make a buying decision as well.

L
Lorraine D.
Herman Miller Aeron Side Activated 7" Stool Conversion Kit

I wanted my Aeron chair (which I love!) higher so I could use it at my drafting board and a 39” high conference table. I hate to admit that I am a 70 year old woman and there was no man around when I wanted to install the conversion kit so I You Tubed it and figured it out! I really didn’t think I’d have the strength to twist the pipe wrench or the smarts to reattach the cable…… but, I did! It was so easy! And honestly the hardest part was getting that crazy heavy chair turned upside down on my higher work surface! So not only do I have an amazingly utilitarian work stool I feel like I totally accomplished something I never thought I could do!

V
Verified B.

Herman Miller Aeron 8" Top Activated Stool Conversion Kit

G
Greg C.
Herman Miller Aeron 10" Stool Conversion Kit

I was buying drafting chairs off of Amazon when i had a perfectly great HM Aeron chair.
So i bought the conversion. After a little elbow grease, I'm happier than i thought I'd would ever been and they also gave me a quick assist email video. Which was nice.
This is the place.

A
Anonymous
Herman Miller Aeron 10" Stool Conversion Kit

works great, shock release can be adjusted on the chair with an allen wrench.

Warranty / Returns

We stand behind the quality of our products. All parts, including these office chair gas cylinders, are backed by a 2-year warranty.

Crandall Office Furniture offers a 30-day return policy on all chair parts. Return shipping costs are the responsibility of the buyer.

We're here to help! If you have questions, contact our support team.

  • Free shipping

    All Parts Ship Free

  • 2 Year Warranty

    We Stand by Our Parts

  • Satisfaction Guarantee

    30 Day Returns

  • High Quality

    Trusted Superior Construction

Choose the Right Gas Cylinder for Your Office Chair

  • Chair Make & Model

    To ensure we send the correct gas cylinder, we'll need your chair’s make, model, and year of manufacture. Check out our tips below, or contact our team for help identifying your chair.

  • Standard Height Cylinder

    Standard height gas cylinder provides typical height adjustment for a sitting desk, ideal for most office chairs.

  • Stool Height (Tall) Cylinder

    Our stool height gas cylinder increases chair height, providing extended adjustment for standing desks and other elevated surfaces.

  • Stool Kit

    Our stool kit elevates your chair and includes a foot ring for added comfort, allowing your feet to rest securely. Ideal for extended work at higher surfaces, preventing your feet from dangling.

Compatible Chairs

Here’s a list of chairs we have confirmed we have gas cylinders to fit.

Due to the variety of chair models, gas cylinders, and bases, we guarantee a compatible fit for your selected chair. However, the seat height adjustment range may differ slightly from your current cylinder.

Steelcase Chairs

  • 442 - Steelcase Gesture
  • 453 - Steelcase Criterion
  • 457 - Steelcase Rally
  • 458 - Steelcase Sensor
  • 460 - Steelcase Rapport
  • 461 - Steelcase Drive
  • 462 - Steelcase Leap V1
  • 462 - Steelcase Leap V2
  • 465 - Steelcase Think V1
  • 465 - Steelcase Think V2
  • 482 - Steelcase Amia

Herman Miller Chairs

  • Herman Miller Aeron (Classic)
  • Herman Miller Embody
  • Herman Miller Mirra 1
  • Herman Miller Mirra 2

Haworth Chairs

  • Haworth Zody 1
  • Haworth Zody 2
  • Haworth Zody LX

Other Brands

A large percentage of chairs made by major brands outside of Steelcase, Herman Miller, and Haworth use a standard generic / universal top activated style cylinder. We have listed some of these brands below:

  • Most SitOnIt Chairs
  • Most Hon Chairs
  • Most Knoll Chairs
  • Most Allsteel Chairs
  • Most Global Chairs
  • Most Humanscale Chairs
  • Most Turnstone Chairs

*We can not guarantee cylinder fit for any of the above chairs.

Questions / Want to Confirm?

Please reach out to us via chat (bottom right in your screen) or via our Contact Page to reach someone who can help.

Frequently Asked Questions

When Will My Parts Ship?

We provide up to date shipping lead time estimates under the "Delivery and Shipping" section of each product page.

You will receive an email with tracking information as soon as your chair is on it's way to you.

Will This Cylinder Fit My Chair?

Above is a complete list of chairs for which we have confirmed compatible cylinders.

Due to the variety of chair models, gas cylinders, and bases, we guarantee a compatible fit for your selected chair. However, the seat height adjustment range may differ slightly from your current cylinder, and your cylinder may look different than the pictured cylinder.

Will My Seat Height Change?

Due to the variety of chair models, gas cylinders, and bases, we guarantee a compatible fit for your selected chair. However, the seat height adjustment range may differ slightly from your current cylinder.

What Size Cylinder Should I Choose?

We recommend a standard height gas cylinder for most chairs used with a standard desk height.

For standing desks or elevated surfaces, an extended (tall) gas cylinder is suggested.

A stool kit, which includes a foot ring, can be added to the extended height gas cylinder for extra comfort when sitting in a raised position.

How Do I Install My Casters?

We recommend using a pipe wrench (the larger, the better) to remove the current gas cylinder from your chair. Once it's removed, the new cylinder can be easily installed.

Please note that chairs with top-activated mechanisms may have set screws that need to be adjusted for proper cylinder function.

For side-activated cylinders, you may need to either attach a cable to the cylinder or ensure the lever is aligned correctly. However, our newly designed cone cylinder for the V2 Leap chair installs without any special instructions.

You can watch a video tutorial of the process below:

What Warranty Comes with my Cylinder?

We stand behind the quality of our products. All parts, including our gas cylinders, are backed by a 2-year warranty.

We're here to help! If you have questions, contact our support team.

How Do Part Returns Work?

Crandall Office Furniture offers a 30-day return policy on all chair parts. Return shipping costs are the responsibility of the buyer.

We're here to help! If you have questions or would like to start a return, contact our support team.

Do You Ship to Hawaii, Alaska, or Outside of the USA?

No, unfortunately we are not currently shipping to Alaska, Hawaii, or outside of the United States at this time.

Customer Reviews

Based on 32 reviews
88%
(28)
3%
(1)
0%
(0)
9%
(3)
0%
(0)
C
Carlo
Herman Miller Aeron 8" Top Activated Stool Conversion Kit

Never worked on office furniture before at all, but with the description and the Videos on YouTube I was able to convert my Aeron to a stool, no problem. Like the videos showed, my 10 year old chair cylinder fitted TIGHT and I did need to get a bigger pipe wrench to get the job done, but I'm sitting happy and comfy now using only the video for instructions (and the Crandall folks seem to be very cool people, it shows).



A suggestion: Maybe go through your kits in the online store and link or embed the appropriate install video? It really gave me the confidence I could do it myself so that probably would help people make a buying decision as well.

L
Lorraine D.
Herman Miller Aeron Side Activated 7" Stool Conversion Kit

I wanted my Aeron chair (which I love!) higher so I could use it at my drafting board and a 39” high conference table. I hate to admit that I am a 70 year old woman and there was no man around when I wanted to install the conversion kit so I You Tubed it and figured it out! I really didn’t think I’d have the strength to twist the pipe wrench or the smarts to reattach the cable…… but, I did! It was so easy! And honestly the hardest part was getting that crazy heavy chair turned upside down on my higher work surface! So not only do I have an amazingly utilitarian work stool I feel like I totally accomplished something I never thought I could do!

V
Verified B.

Herman Miller Aeron 8" Top Activated Stool Conversion Kit

G
Greg C.
Herman Miller Aeron 10" Stool Conversion Kit

I was buying drafting chairs off of Amazon when i had a perfectly great HM Aeron chair.
So i bought the conversion. After a little elbow grease, I'm happier than i thought I'd would ever been and they also gave me a quick assist email video. Which was nice.
This is the place.

A
Anonymous
Herman Miller Aeron 10" Stool Conversion Kit

works great, shock release can be adjusted on the chair with an allen wrench.

Crandall Office Furniture

Premium Office Chair Stool Conversion Kit with Foot Ring – Extended Height

$11999

A replacement gas cylinder fixes sinking office chairs and restores height adjustment, extending your chair’s life without needing a full replacement.

We offer a wide range of gas cylinders to fit various office chairs. Simply select your chair model from the dropdown, and we'll ensure you receive the correct cylinder for your chair.

View product