Our heavy-duty chair wheels are made from industrial-grade steel, precision ball bearings, and durable polyurethane chair casters. Its not compatible with IKEA chairs and not either with some off brand chairs, our stem size is 7/16' x 7/8' Our desk chair wheels replacement will NEVER scratch, smudge or damage your floors. Enjoy a carefree, safe glide across wood, hardwood, laminate, vinyl, tile and carpet floors all day long. Regarding the smooth rolling on carpet it depends on the pile carpet that you have, some roll better and some arent as smooth. High pile carpet usually rolls less smooth then low pile.