There are dust seals over the bearings. I have found multiple instances of the dust seal rubbing on the metal while spinning due to the rubber being dry.
Pry the rubber cover up a little and push grease into the bearing. Then make sure the rubber cover has a thin layer of grease all the way around on the underside.
Pry the rubber cover up a little and push grease into the bearing. Then make sure the rubber cover has a thin layer of grease all the way around on the underside.