How much weight do/can these support?

My weight is 225. My understanding is up to 300. Do not like these because they did not solve the problem of working well on carpet.

Do the black version leave any black scuff marks on laminate flooring?

Our office chair wheels are made from polyurethane. They look and feel like synthetic rubber, but they will not stain or live scuff marks on your floors.

Where can I contact the company for this product? I need to speak to support.

I purchased my set on May 15, 2021 and the bearings are already deteriorated and wheels barely spin. They've been used indoors on hardwood in an office and while they've been so much better than what came on my Hermann Miller Caper chair certainly disappointed that they're not able to be taken apart and the bearings replaced like an actual rollerblade wheel assembly. It is dusty here in Arizona so I suppose that could have lead to their more rapid breakdown than other reviewers' updates but still for the price they should at least make it a few years. The QR code on the warranty registration card that was shipped in the box never worked and led to a web server directory listing page which was empty as did the gift card promo and now I read that the warranty is only good if you registered (with a link that doesn't work) the product in order to get the limited lifetime warranty. If you're going to promote lifetime warranties as major selling points then make them an actual lifetime warranty like more established brands instead of trying to get out of actually replacing something that appears to be defective by design. Hopefully they'll make it right and we can all update our reviews to mention how quickly their support staff rectified the issue and how we still recommend these wheels as a "must have" upgrade.

Hi, will these fit Eurotech chairs?

I'm not personally familiar with Eurotech chairs, but from what I could find, I'm pretty sure our casters will fit. To make sure, you can measure the original casters' stem diameter. It should be 7/16" (11mm). In the unlikely case, our replacement chair wheels won't fit you can easily return them for a full refund.

Load capacity	650 pound
Caster type	Ball
Surface recommendation	Multi-Surface
Wheel width	2 Inches
UPC	646437668552
Manufacturer	OPTTICO
Part number	Opttico
Item Weight	1.13 Kilograms
Item model number	Opttico
Size	Universal Stem Size 7/16" x 7/8" (11mmx22mm)
Color	Black
Style	Rollerblade Style Office Chair Wheels
Item Package Quantity	5
Cutting Diameter	3 Inches
Accessory Connection Type	C-Ring
Special Features	Hardwood Safe, Heavy Duty, No Scratching, Non-Marking, Smooth Rolling
Specific uses	Office Chair, Desk Chair, Stool, Gaming Chair
Included components	5 Casters
Batteries Included?	No
Batteries Required?	No
Item diameter	3 Inches

Office Chair Caster Wheels Replacement - Best Black 3 Inch Desk Chair Wheels - No CHAIR MAT for HARDWOOD FLOOR Needed - Rollerblade Style HEAVY DUTY Computer Chair Casters With Soft Rubber Wheels.

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