Originally Posted by
squirtdad
and none of this deals with simple thing like bikes falling and hitting top tube with handle bars
Apparently you have missed the many bf threads about damaged steel and aluminum bike frames. Some of them have been quite amusing. There was the poster who had clearly dropped his aluminum frame's top tube into a door frame and put in a vertical crease… But he insisted it came from changing temperatures creating some kind of vacuum effect inside the frame. There was also a guy who took out his brand new, custom built, thin walled tubing steel frame on its very first ride, and let the handlebar twist around and slam into the top tube. Boy, was he angry! The builder, Waterford, would not give him a free repair. Richard Schwinn’s response was, “You wanted a lightweight steel road bike – you got it!“
Again, this is not a carbon fiber problem.