I installed some fenders on my bike and now the hub on my front wheel is rubbing.
Here you can see that the fender hardware is applying pressure to the rubber dustcap:
Despite the fact that the dustcaps do not and should not rotate, if I remove them then everything is buttery smooth:
What should I do with these little buggers? Stick them in my box of bike parts and forget about them? Shave them down a little bit so they aren't flexed by the fender hardware? Do I really need them?