Rotation is important because tires wear differently. Also, the tires on any one vehicle wear differently. They are all mounted in different positions and some are drive tires while others are not. This means all four tires will wear in different areas. Rotation will allow them to wear evenly so that one area won't wear out quicker than another.
Different seasons require different characteristics in tires.
Yokohama offers a variety of high performance products designed to provide outstanding performance in all seasons. Drivers of high performance vehicles should also be aware that treadwear on these types of vehicles will wear much more rapidly than that on a regular vehicle. This means rotation becomes even more important. In winter driving, it is important to remember that as a tire wears, snow traction is reduced. Tires that are worn close to the tread-wear indicators have significantly reduced traction and should not be used on snow covered roads.