I am looking for luggage with quiet wheels. That means that even if I am walking on a below average quality European sidewalk with lots of small gaps between the cobblestones pulling the trolley after midnight through an empty street doesn't annoy the people living on the ground level of that street.
This is a very demanding requirement. But humans are inventive and there should be a market for it. Google wasn't of much help.
I am willing to trade off extra friction for reduced noise. Air filled wheels sound like a good idea to me. Any tips would be appreciated.