Originally Posted by
BCRider
Listen to B'girl. You may well have a french threaded BB that is more difficult to replace than you figure at first glance.
Depending on the date, it's either French (both sides properly threaded) or Swiss (fixed cup moron-threaded). SR bottom brackets (which is what it would have come with, unless it's very old, in which case it's french threaded) say how they're threaded, but it's sort of cryptic. The clue is that the cups on the opposite sides say different things, which tells you that one of them is moron-threaded. (bottom bracket cups don't precess off. the left threading serves only to annoy.)