Originally Posted by infinityeye
pretty sure it has standard british ISO threading, again be careful removing the BB. You can google it for the proper tool, and maybe get the threading and removal directions that way. I ended up taking a drill to it after messing up on side of the cups. It was very stubborn for derlin. If it still spins OK maybe just leave it in there. After removal on my ('87) peugeot I was able to thread a suntour BB in there with ISO threading. Your's look a little older though
Sure enough, it's ISO (marked BSA, 1.37X24tpi). Didn't realize that Peugeot smartened up once and for all and finally got around to using English BB threading.
Would the Sheldon bolt-type extractor tool damage the BB? That's what I figured on using.
It still spins like new, but I don't like the idea of a plastic BB just waiting to shatter into a thousand pieces while I'm giving the crankset 210 pounds of sheer, flat-out hell.
Take care,
-Kurt