When we had our popup many years ago, we ended up carrying 2 spare wheel/tires. Why, you ask? Well, on one trip, we had a tire fail in Glendive, MT. We ended up driving to Great Falls, MT for tire replacements. When we got to Canada, we had a blow-out that ripped up the plastic wheel well. Duct taped it back together. Finally replaced the wheel well with a galvanized steel one. On another trip one tire tread came off but it still held air. Another person in a gas station noticed it and told me while we were filling up the van.