Black/Red Dots
Although this might be fun and games, some of the newbie’s may wonder what you two are talking about here.
FBA refers to the "little round black stickers on the wheels". He is correct. Prior to Ford assembling the alum wheel and the Goodyear tire, the two "pieces" were balanced separately. I believe this most probably occurred at the vendor level, not with Ford. So the wheel manufacturing vendor (BBS) determined the circumferential mass distribution of the wheel and marked the heaviest portion of the wheel circumference with a round black stick-on dot about the size of a paper hole punch. These stickers were paper backed and did not last long in a driving (or wheel washing) environment thus the line that if the wheels still had these black stickers on the rim it would indicate very little actual use.
Andy refers to “oem wheels came with red ones”. Well, that is kinda right too. Goodyear did the same type balance operation on the virgin tires after they were made. They used a reddish orange circular stamp on the outside sidewall of the tire (our tires are directional) but the Goodyear stamp indicated the “light” side of the tire circumference. I might have the heavy wheel/light tire transposed but the object of having these dots was to “prebalance” the assembly of rim and tire to capitalize on the inherent imbalance of each to help reduce the overall balance necessary for the final assembly. This type of prebalance is frequently done with aircraft tires. If you look at a FGT that happens to have OE build tires (most likely on the front) you may still see the Goodyear red stamp on the sidewall. My fronts still show the mark after 14K miles. (Rears have long since been replaced and new Goodyears purchased from a retailer do not have the balance stamp). Goodyear told me once they did this specifically at Ford engineering request.
This way when Ford mounted the two pieces and lined up the two dots (black on the rim and red on the tire) the assembly balance would be minimized and the owner would have a minimum of ugly weights stuck on the inside of his rims.