Hi, does anyone have any knowledge, experience or information on these?I'm not even sure what to call them! I recently purchased some wood rims from France and these are coming with them. I couldn't find a great deal of info online and was hoping someone out there may have knowledge of them. From my limited research they are an early, pre inner tube, tyre cushioning device; or I have heard they were used during WW1, when rubber was in short supply. I would love to know more! More pictures to come when they actually arrive. Thanks, Darren.