Is there anything baking soda can't do? I didn't know whether to post this wheel here or on the Helloise page. Baking soda is a camping kit in a cardboard box! It takes up "little space" unless you plan to have more than a couple of misadventures on your trip. You can use it to soothe tired feet, brush your dentures, scrub out your bait bucket or wash the windshield. Heaven forbid, however, if you have a car fire because that's going to cost you the entire box.
This wheel is 8.5 inches in diameter and in very good shape. I don't know how old it is, but it's got to be from the 70s, don't you think?