Wheel bearings are crucial components in a car’s wheel hub assembly that help reduce friction between the wheel and the axle when the vehicle is in motion. They are designed to support the weight of the car and provide a smooth and quiet ride by allowing the wheels to rotate with minimal resistance.
Usually, wheel bearings are made up of metal roller elements (either ball or tapered shape) placed in a circular cage and sandwiched between two circular, smooth metal surfaces called races. The bearings are greased and sealed to protect them from dust, dirt, and debris that could cause damage or excessive wear.
Over time, wheel bearings can wear down, become contaminated, or lose lubrication. This can lead to increased friction and potential failure of the wheel bearings, making it essential to replace them when necessary. Signs of bad wheel bearings include excessive noise (such as grinding or humming sounds) when driving or steering, vibrations, or loose or unstable steering.