What’s the ball between the rear wheels and tires

## The Ball Between the Rear Wheels and Tires: A Comprehensive Guide

### Introduction

The automotive industry is constantly evolving, with new technologies and innovations emerging at a rapid pace. One of the most important components of a car is the differential, which plays a crucial role in transmitting power from the engine to the wheels. The differential is typically located between the rear wheels and tires, and it contains a number of gears that allow the wheels to turn at different speeds when necessary. This is especially important when the car is turning, as the outer wheel needs to travel a greater distance than the inner wheel.

In addition to the differential, there is also a ball located between the rear wheels and tires. This ball is known as the wheel bearing. The wheel bearing is responsible for allowing the wheels to rotate smoothly and freely, and it also helps to support the weight of the car.

### Types of Wheel Bearings

There are two main types of wheel bearings:

Ball bearings use a series of small balls to reduce friction between the rotating parts. Ball bearings are relatively inexpensive and easy to manufacture, but they are not as durable as roller bearings.
Roller bearings use a series of cylindrical rollers to reduce friction between the rotating parts. Roller bearings are more durable than ball bearings, but they are also more expensive and difficult to manufacture.

### Functions of the Wheel Bearing

The wheel bearing has a number of important functions, including:

Allowing the wheels to rotate smoothly and freely
Supporting the weight of the car
Reducing friction between the rotating parts
Extending the life of the tires

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### Symptoms of a Bad Wheel Bearing

A bad wheel bearing can cause a number of problems, including:

A grinding noise from the wheels
A vibration in the steering wheel
Difficulty steering
Uneven tire wear

### Causes of a Bad Wheel Bearing

There are a number of factors that can cause a wheel bearing to fail, including:

Lack of lubrication
Excessive wear and tear
Impact damage
Corrosion

### How to Replace a Wheel Bearing

Replacing a wheel bearing is a relatively complex procedure that requires specialized tools and knowledge. It is important to have this work done by a qualified mechanic.

### Conclusion

The wheel bearing is a critical component of the automotive drivetrain. It allows the wheels to rotate smoothly and freely, supports the weight of the car, and reduces friction between the rotating parts. A bad wheel bearing can cause a number of problems, so it is important to have it replaced as soon as possible if you suspect it is failing.

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