I need to replace the bearing in my front (non ebike) hub.
The hub takes 3/16 bearings, they have a 4.78mm diameter.
To fill a 4.78mm squared cube takes 0.109ml of liquid.
So if one side of a hub takes 11 bearings then:
11 X 0.109ml is 1.199ml.
You would only fill half the space each side...