Wheel bearings are a set of small steel balls or rollers that support the wheel and allow it to spin freely. Unusual noises, such as clicks, rumbles, and groans that change with the vehicles speed may mean that the bearings are worn and an inspection may be necessary.
If the wheel bearings get damaged, they are not able to help the wheel rotate smoothly and the wheel will get damaged. If the bad wheel bearings are not replaced in time, the locked wheel can come off and cause quite a bit of damage. For more information click and watch: