Why and how are tires rotated?

Why? To even out tire wear. The front tires will wear much quicker than the rears on a FWD vehicle. The front tires are pulling the vehicle and are also steering the vehicle. This causes friction which causes wear. You rotate by simply putting the rear tires on the front and the front tires on the rear every 10,000 miles. Click the link and go to Tire Rotation.