Wheel alignment is the precise adjustment of the steering and suspension components to ensure that all wheels are oriented correctly, compared to the other wheels, the chassis, and the direction of travel. Small changes can have a big effect on how the car drives. Proper alignment provides the best compromise between responsiveness, stability, and tire wear.
Alignment specifications differ from model to model. It is important to use the correct alignment specifications for the specific car. Wheel alignment can also be fine-tuned for specific driving conditions. If, for example, the car normally carries only one person or is often heavily loaded, this information may help the alignment technician. Like tire pressure, wheel alignment also has some influence on fuel economy, because of its potential to affect the tires' rolling resistance.
Replacement and/or removal of the trailing arms, torsion bars or torsion plates (rear) disturbs the rear wheel alignment settings. Replacement or adjustment of the front or rear torsion bars or the rear torsion plates also affects vehicle ride height, which directly influences vehicle balance. If ride height is changed, it is strongly recommended that the vehicle balance/weight be checked at all four wheels using suitable wheel-load floor scales. See 440 Wheels, Tires, Alignment for more information.
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