
I'm sure they won't move once installed. but it's more of a rubberized hard plastic so it would be more flexible if it was real rubber. I have rubber pens that are really rubber. But like others, I have them to protect the top tube from scratches when the bars hit it and to keep the bar tape and left side mirror in place. This should work fine, but the lip is too big for most of my salsa bars and the stem is too thin to use. resorted to using black tape to hold them in place.

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