Modern steering and suspension systems are great examples of solid geometry at work. Wheel alignment integrates all the factors of steering and suspension geometry to provide safe handling, good ride quality and maximum tyre life.
Front wheel alignment is described in terms of angles formed by steering and suspension components. Traditionally, five alignment angles are checked at the front wheels-caster, camber, toe, steering axis inclination (SAI) and toe-out on turns. When we move from two-wheel to four-wheel alignment, we add setback and the vehicle thrust angle into the equation. Rear wheel camber and toe also must be checked for a four-wheel alignment.