I call it a lockring but technically it might have another name. It's threaded in. It def prevents the allen bolt from being removed if
i cannot get it out. So I am taking out these rings to ultimately service the BB.
By the way the lockring and allen head look just like this
ultegra and old Ultegra- they wont let me post url's either!
Last edited by Peterparis; 03-24-24 at 02:20 AM.
Reason: add to