Thanks a bunch for your reply. I really appreciate your attachment. Looks like a couple of plates, or assiettes, as you say, bolted together with spacers between them. I do have solid tires, so the lower diagram applies. I may try to get one off before I bring the machine back home. I brought it to work a couple of weeks ago to weld a new lower strip of tin for the windshield which was pretty rotted out, and to repaint it also. New glass seals to be installed this coming week by a glass shop, and I had a local graphics shop make a few vinyl decals to replace the ones that were missing (all of them). So it is starting to look like a pretty cool machine! But I may try to remove the cracked up solid wheel before bringing it back home though. Thanks for the post Benz!