>>It depends on the specific tire.  My Hakkas are "Directional" and can
>>only be rotated from front to rear.  Not from one side to the other.

I had some directional Nokian WR tires on a work truck I used to drive.  Kal Tire switched tires from side to side for me.  They took the tires off the rims and remounted them so the directional arrow was still going the right way.  There were no problems.
George
'85 Westfalia