Originally Posted by
alaska
are you using a proper french threaded fixed cup?
yr adjustable cup is coming loose, right? if it's campagnolo, it'll be english threaded- which means it's not exactly right but it works. the bottom bracket does need to be adjusted correctly though to hold an adjustment and maintain any strength.
if you get it properly adjusted and it still comes loose, i'd use teflon tape.
I don't know if the fixed cup is french, I just know that it threads on easily. The floating cup is the same one from when I bought the bike. The thing is, I'm using random parts, and they're all used. The cranks are two different brands, the chainring I have didn't come with the crankset, and the spindle is just some random one that fits. I saved $200 by fixing up my bike myself with used parts, rather than taking it a shop and having the parts ordered. I don't understand how the floating cup is coming loose, because the lock ring is still on super tight every time I undo it and readjust the floating cup. How would I use teflon tape?