So I may have over tightened a cross bolt adding to over all tension when trying to “activate the wheels”so they are a lil stiff but other wise for the application I used them for they are perfect!! I built a slightly larger than normal platform for a sim racing rig and attached this to aid in moving it out of the way. Total estimate weight is a guess of about maybe 90-100%23 absolute max. Lumber, aluminum frame rig w/seat, Logitech FFB wheel,pedal,shifter combo and personal flare… And even on carpet, cough cough Walmart 5x8 rug, it glides like butter!! You would think that it's water on glass kind movement!! I can move that whole setup with my literal toe!! I WILL BE BUYING ANOTHER SET FOR A LARGER TOOL BOX!!