I am trying to find a pair of 1 1/2" thin hard rubber (I think they were neoprene) wheels. We used them in narrow wheel pants. Aluminum hub, some had "spokes" some were smooth. Wheel was very narrow where it hit the pavement and was parabolic in profile. I think they were made by Perfect. I couldn't even find a picture on the internet. I hate the new type. Set them on a hot circle and they go flat on one side. Plane goes thump, thump, thump when it lands.
ken