[cypher]

I've got four silent runners & none of them rattle they really are silent so it may be that it isn't assembled correctly, to double check after reassembling mine I just put it face down on a hard surface & press down firmly all around the rim, you can just spin the stand out of the way so you can press all around, often there's just one or two spots that will click into place when I do that.
They can make a noise moving around if standing on a hard surface so maybe it's that rather than the wheel?
I use dowels or lolly sticks glued to the wooden shelves mine stand on to keep them in place & find a few sheets of toilet paper underneath can help stop them sliding about & making a noise too.