I recently bought a used Diamondback Sorrento. One day I rode it over a sizable bump and heard a popping noise. Upon inspecting my bike I noticed the following:
As far as I can tell, I lost a rubber stopper that protects the shocks from dust/water/etc. What exactly is it called? How important is it that I replace it? Do I need to worry about protecting the inside of my shocks until I do?