Keeping your wheels aligned will save you tread ware, which saves you money. You will get the best performance and wear from your tires when you routinely align your wheels.
Poor alignment is a result of the suspension and steering systems being out of adjustment.
This usually results in abnormal treadware. If you notice unusual wear on your tires, check the inflation pressure of your tires, and have your alignment checked. The most complete method of alignment is four-wheel alignment. Front-end alignments check only the front tires. Caster, camber and toe are the measurements that must be checked during an alignment.