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I took out the cup-and-cone-type bottom bracket (Shimano Deore BB-MT60) from my old bike to reapply grease. The spindle, cone surface, and the bearings are all fine, but the rubber seals have become brittle from age and broken off into pieces from me trying to disassemble and clean the BB.
Are there replacement rubber seals for these, or should I just give up on this BB?