Originally Posted by
XxHaimBondxX
Bike fell "while leaning on the bike rack, hitting some metal part of it."
I finally had time today to look at it closely and definitely felt quarter sized soft spot between two paint chips. Anyone has 58-60cm frame laying around?
https://youtu.be/tGLKSWI7IWs
Ray Magliozzi, one of the Car Talk guys: "Uhh... you're done for."
The soft spot may behave better than a crack in metal, where that crack end is a big stress concentrator, and will continue to grow (which is why, drilling a small round hole to end a crack, often works). You have a good amount of redundant load paths in the carbon around the crack, the question is how much localized (in material plane) compression or shear loads you get at the soft spot. If it was just a townie riding slow, I might ride and monitor, but for anything off-road, or fast rides, or long tour, I wouldn't take the chance.
By the way, a respected LBS recommends against carbon ANYTHING, unless you are in competitive racing, due to fragility, bad failure modes, and also hazards of sharp edges on such:
https://rideyourbike.com/carbonfiber.shtml