What does a "four-wheel alignment" adjust?

A four-wheel alignment specifically adjusts the angles of all four wheels to ensure they are parallel to each other and perpendicular to the road surface. This process is crucial for optimal tire performance, vehicle stability, and even tire wear. Proper alignment helps to promote good handling characteristics and improves fuel efficiency by reducing rolling resistance.

When a vehicle is misaligned, it can lead to various issues, including uneven tire wear, pulling to one side while driving, and impaired handling, which in turn can affect safety. By adjusting the camber, caster, and toe angles of the wheels during a four-wheel alignment, the technician ensures that the vehicle handles correctly and maintains proper contact with the road at all times.

In contrast, the other options do not accurately define what a four-wheel alignment entails. Tire pressure adjustments are crucial but are separate from alignment issues. Adjusting the braking system is entirely unrelated, focusing instead on stopping power rather than wheel orientation. Lastly, while steering wheel position may be affected by alignment issues, it is not the primary focus of a four-wheel alignment service, which concentrates on the angles of the wheels themselves.