DH put my old alloy bottle cages on my new bike. Since the first ride there has been this rattling. It is so constant when we are on bumpy roads only, I am guessing it is the bottle cages. The cages are a few years old and I started having a problem with bottles coming loose in one a few months back.

Is it the cages? I want to get some carbon cages, but they are so pricey. Maybe just some new alloys that are not stretched? It is like fingernails on a chalkboard to me at this point.