Anyone seen it? It's a simple but really good idea - it's a magnet to let other drivers know that you're using a spare tire and to treat you with caution. It's been made to be incredibly durable and stay on your vehicle and can take the stress out of driving with a spare tire. It's being funded on Kickstarter at the moment. Search for "Caution Spare Tire In Use Safety Magnet" on there if you want a look. It's well worth checking out!