There are many hazards that can make tires less effective and more of a danger to drivers and passengers. It is not uncommon for a sharp stone, nail, or other pointed piece of debris to puncture a tire. Because flat tires are dangerous to use, it is advised that motorists only drive on them in extreme circumstances, such as when they need to reach safety from a busy highway. It is also important to note that the longer a driver uses a flat tire, the more unlikely it becomes that a tire repair service can be performed. This is because riding on a flat tire for too long can cause irrevocable damage to the tire. As the tire deflates, the wheel will come into closer contact with the ground, potentially damaging the rim. It is important to understand that tire repair is time sensitive. The sooner you are able to bring a lightly to moderately damaged tire in for repair, the more likely it is that the tire can be saved.