Originally Posted by
tatfiend
Read the label. What is the citric acid going to do to metal and how well is it going to stand up?
Considering the very small amounts of grease used in bicycles I do not think that bearing grease is a major concern enviromentally. I would be as concerned about a biodegradeable grease breaking down in use or bike storage with consequent parts damage.
citric acid is pretty weak, especially in low concentrations.
they can erode tooth enamel in high concentrations.
what they're pretty good at, like tomato juice, is cleaning off rust.
I would guess how corrosive that lard is depends on the concentration of citric acid in it.