I often walk by a different ghost bike that’s quite a bit older and is in really rough shape…in the case of this other bike I don’t think you can definitively chalk it up to the bike having been hit (though it may have been), it has been around long enough to have been knocked around in multiple violent thunderstorms, etc. I’m guessing that there’s not a formal process to maintain the condition of ghost bikes once they’re installed? As these monuments age, that could become more of an issue.