Axle bearings are the bearings for the drive wheels. These bearings absorb both radial and axial forces. Inadequate lubrication is the main reason due to which bearings wear out. Improper adjustment or faulty installation can also be the cause. From the looseness in the steering, or from the abnormal tread wear- a knowledgeable motorist can guess what is happening under the hood. It is important for every operative to know how to identify worn wheel bearings and how to properly service them.