Alignment is the process of making sure all 4 wheels point in the same direction, which will cause the vehicle to drive straight and not drift. Performing this service regularly (yearly or after the vehicle starts drifting) will extend the life of your tires. Alignment is measured in degrees of camber (tire leaning inward or outward), caster (forward or backward slope of steering components in relation to the McPherson struts) and toe (the direction the tires are pointing). Toe-in means that the tires are pointing inward; toe-out means that the tires are pointing outward. Most vehicles are “averaged” for everyday driving.