Why does my car feel like the tire is about to fall off? Well this could be a sign of a broken tire belt. A few things can cause a tire belt to break. Pot holes are the worst enemy! Defective Belts, improper mounting and aging are a few as well. In really bad cases you will be able to feel the separation if you run your hand around the tire. Be careful that no steel belts are exposed when you do this. Most people just notice wobbles at low speeds. It's important to change your tire right away to avoid a blowout.