Does the chair have a tendency to roll around (unwanted) when on a hard surface?

I had it on one of those plastic mats in front of the computer and it did not roll around. However, that is not the same as a really slick hard surface, so maybe someone else has more experience with that.

Would this chair be suitable for a 6'tall man?

A friend of mine who is 6 ft tall sat in it and said it would definitely work. He couldn't believe what a difference it made. The only problem I can see is the position of the lever that lowers the seat. I hit it several times on accident when I first got the chair but I guess I got used to it because I haven't accidentally lowered the seat since the first month I was using it. I have had the chair about 8 months and you can feel the difference the moment you sit down. It is incredible how much better your back feels compared to sitting in a conventional chair. I recommend this chair to anyone who has back problems, especially if sitting causes you pain. It does take some getting used to so I started out alternating between this chair and my regular office chair gradually increasing the amount of time I use the ergonomic chair.

Can you remove the wheels and just have the bars touching the floor?

Try using bed base wheel cups so you don't have the bare pipes damaging the floor: https://www.amazon.com/WEWGO-Stoppers-Furniture-Cups-Pack/dp/B07QB6D68B/ref=sr_1_3?dchild=1&keywords=bed+wheel+covers&qid=1595617138&sr=8-3

do we have any idea of the maximum height on the seat? Could the 25" be the maximum height possibly?

At maximum height, mine is 25" in the back, and 20" in the front; minimum is 19 1/2" in back, 18" in front.

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Boss Office Products B248 Ergonomic Kneeling Stool, Black, Low-Back

Boss Office Products B248 Ergonomic Kneeling Stool, Black, Low-Back

Product ID: 4961179

Details

Brand
Boss Office
Color
Black
Material
Alloy Steel
Product Dimensions
26.5"D x x
Size
unspecified

📏Adjustable knee height for personalized comfort

🖤Durable black tubular steel frame with fabric finish

⚙️Pneumatic gas lift for smooth seat height adjustment

Description

🪑 Elevate your workspace posture—comfort that means business!

CUSTOMIZABLE COMFORT - Adjustable knee platform adapts seamlessly to your posture and height, ensuring all-day ergonomic support.
SLEEK DURABLE BUILD - Black tubular steel frame paired with breathable fabric offers a modern look that stands up to daily use.
POSTURE PERFECT DESIGN - Encourages upright alignment of back, shoulders, and neck to reduce lumbar strain and boost productivity.
MOBILITY MEETS STABILITY - Hooded double wheel casters glide smoothly on hard floors, combining easy movement with firm support.
EFFORTLESS HEIGHT CONTROL - Pneumatic gas lift lets you fine-tune your seat height with a simple touch—perfect for shared workspaces.

The Boss Office Products B248 Ergonomic Kneeling Stool features an adjustable knee platform and pneumatic gas lift for personalized seating height. Its ergonomic design promotes upright posture by aligning the back, shoulders, and neck, reducing lumbar strain. Built with a durable black tubular steel frame and breathable fabric, it offers both style and long-lasting comfort. Ideal for office environments, it supports up to 275 pounds and glides smoothly on hard floors with hooded double wheel casters.

Specifications

Brand	Boss Office Products
Color	Black
Product Dimensions	26.5"D x 17.5"W x 20"H
Size	unspecified
Back Style	Solid Back
Special Feature	Our design eases the hips forward and encourages an upright posture by aligning the back, shoulders and neck to relieve strain on lumbar muscles, Stool has adjustable knee height allows for multiple users, Stool has kneeling stool offers excellent ergonomic support and ease of use
Product Care Instructions	refer to instructions
Unit Count	1.0 Count
Recommended Uses For Product	Office
Maximum Weight Recommendation	275 Pounds
Style	unspecified
Pattern	unspecified
Finish Type	Fabric
Room Type	Office, Study Room
Age Range (Description)	Adult
Included Components	Boss Office Ergonomic Kneeling Stool
Theme	unspecified
Shape	Round
Model Name	Boss Office Ergonomic Kneeling Stool
Arm Style	Armless
Surface Recommendation	Hard Floor
Seat Back Interior Height	14.5 Inches
Furniture base movement	Glide
Indoor/Outdoor Usage	Indoor
Furniture Finish	Black
Seat Height	25 Inches
Seat Depth	13 inches
Fill Material	unspecified
Seat Length	13 Inches
Leg Style	Tapered Leg
Tilting	No
Is Customizable	No
Is Foldable	No
UPC	799198178034 013583023533 783185240293 722651252484 722651240870 751118024814 719918361904
Global Trade Identification Number	00751118024814
Form Factor	unspecified
Fabric Type	Other
Manufacturer	Norstar Office DBA Boss
Item Weight	15 pounds
Item model number	B248
Is Discontinued By Manufacturer	No
Weight	20 Pounds

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