Had to replace a rear tire on my C2S. They removed the old weights from the inside of the rim and put new ones on in a different spot. The "glue" from the old weights is on the rim. What's the best way to remove the old glue? It doesn seem to peel right off.
Use 3M General Purpose Adhesive Remover. A few drops on the foam tape, wait 2 minutes and wipe the tape right off with no residue. In the US there is also a product called "Goop" that will do the same thing.
I also replaced a tyre. They put the weights in the same spot, but the weights look totally different and IMO a bit odd. I think I'm just being paranoid though as nobody else I have pointed it out to notices any difference.