Thanks for the info. I had no idea rims were marked as well as tires. The dot on the tire wears off, I presume. One of my rears is spinning backwards. Never corrected that for fear of rim damage. Tires now need to go. Rim damage risk is on. Wish rims coul dbe split at home so no grease monkey handled my wheels. I have had many damaged by installers. None in my special interest cars though.