Originally Posted by
Andy_K
As Chaz used to ask, "Is it wrong, or just French?" In this case, both. I've got five French bikes in the garage. One has a Swiss threaded bottom bracket. Three of the other four have had the bottom bracket come unthreaded on me while I was out on a ride. I'm a slow learner, but I eventually started remembering to Loctite these things when I put them together.
Yeah, I learned the same thing from bitter experience. One time I had to wait while a friend rode home, got his car, and gave a ride back - after administering liberal doses of verbal abuse. The other time the BB came loose (but not all the way out, thank goodness) more or less at the top of the ridge near my house and I was able to coast almost all the way home.
My take-away: Use blue loctite, tighten the DS cup until it screams for mercy, then tighten it a little more, torque specifications be damned. I suspect but do not know that this would be a bad idea with a carbon fiber frame - I expect never to find out.