Bottom Bracket Seal for Shimano BB

thingiverse

A replacement seal specifically designed for vintage (circa mid 80s to early 90s) Shimano Bottom Brackets is available for immediate use. These seals were originally crafted from rubber, yet PLA also proves to be an effective material choice due to its ability to keep dust and moisture out of the system. Installation of these seals into the BB cup requires a bit of force and can be quite tight, necessitating the squishing of the printed seal. However, if properly printed, PLA is capable of withstanding this pressure without sustaining any damage. Once securely in place, the seals will remain steady and provide the correct thickness to create an effective seal around the axle. These replacement seals are designed to be compatible with a wide range of Shimano BBs from the specified era, making them a valuable resource for those in need.