I have a Cinelli bar (Criterium) and a Cinelli stem (XA), but the stem closure is slightly bigger than the diameter of the bar. I had thought they were both 26 mm, but not so. Now, I don't know if the bar is 25.4, or if the stem is 26.55. But that doesn't matter for what I want to do:
I would like to cut a piece of rubber strip from an old inner tube and use that as a shim. Bad idea?
Thank you for any help or even suggestion!