Hearing abnormal noise is one of the most basic signs of a bad wheel bearing or wheel hub bearing.  However, some may be difficult to detect, because a worn wheel hub may vary in severity.  Often, the wheel hub bearing will be damaged even before the signs will be detected. 

When traveling, drivers usually expect things to go smoothly, but there are some tools to carry with you, just in case, because auto parts do malfunction, and emergencies do happen. Even the most basic tool can be a lifesaver if you find yourself stranded miles from an auto parts store.