Originally Posted by SkyDancer

Are you sure about this? You are correct the tire has to be mounted on the rim with the correct side 'out'. However when I took my Z (touring / sport) in to Discount Tires (who I consider to be top notch in their business niche) to rotate them (rear to rear; front to front) they said the tires should not be swapped to the other side because the tread pattern for channeling water becomes reversed which affects the tire handling on water surfaces.