Originally Posted by balto charlie
Hey folks: After many failed attempts I was finally able to remove my BB but not until I damaged the plastic lockring. I also need to replace my old sealed Shimano BB. Does the new bb come with a lockring? I can't seem to locate replacement lockring at online stores(Alfred,nashbar). Maybe it's not called a lockring. One side is metal(that one is still good) and the other is plastic. Thanks Charlie
Those things are usually called the cups, the two threaded pieces that go into the shell.
They're called cups because on old cup-and-cone bottom brackets the threaded pieces were bearing cups. Now they're basically just there to hold the bottom bracket cartridge in place. A new Shimano BB will come with them, as sydney pointed out.