Q: The bearings I received have a green shield on one side and a black shield on the other. Should either of these be removed on the back bearing? What about the front? Are these colored differently to indicate direction or does this matter?
A: Firstly the different colored seals do indicate which is the open side on the bearing. The green seal is the one to remove to expose the open side. However, on the front bearing there is no need to remove either seal. Keeping both seals on offers better protection for the bearing. These bearings are lubed with grease and the seals will keep the grease in for the life of the bearing so there is no need to worry about lubrication. With regard the rear bearing both seals can be removed if needed and is probably advisable.