Well, I'm not 100% sure. I think I'm going to cut one off and have a look. http://williampowell.net/fullhtm/redbugfl/redbug4.htm Though, I have seen redbugs that were restored and the new owners put on newer rims.. Here's a page a created a while ago, some pictures of somebodys nice redbug and my weathered redbug at the bottom. It was sitting on my grandfathers porch for about 30 years. http://williampowell.net/pages/redbug.htm