Wheel alignments help ensure your tires are angled correctly—level with the ground, pointing straight ahead, and parallel to each other—so they can maintain straight-line tracking. Proper alignment angles will help you maximize the life of your tires. In addition, the handling of your vehicle will be considerably easier. Wheel alignments are arguably the most important aspect of wheel and tire maintenance. Three angles promote proper wheel alignment: toe, caster, and camber. Toe is the measurement between tires. Your tires should be in equal positions and parallel to each other. Caster, or the angle of the steering pivot, permits the wheels to turn along with the steering wheel. Camber is the angle of the wheel, which should be perpendicular to the ground. Four-wheel alignments are an important part of extending the life of your tires, because misaligned tires inevitably lead to poor tire performance and uneven tread wear.