When you get a flat tire, you’re probably going to be replacing it with a “donut” spare. This is a functional, no-frills substitute designed to get you out of a tight spot. Your manufacturer equipped you with this spare because it’s simple and efficient, as it takes up a lot less space in your car than a proper tire. Unfortunately, this means that it is not ideal for extended periods of usage. It’s got no tread or reinforcement, so you’re likely to notice a drop in performance vis a vis cornering, handling, and braking.
When you put on a donut, your next stop should be our auto body shop in Seattle. If you’re driving for more than about seventy miles, you could be in trouble.