Originally Posted by
DanseMacabre
The strength of a tube is in the round shape. The round shape here has mostly gone.
A can of soda with this kind of dent, if standing on it, it would probably collapse.
this is the right way to look at it. The section modulus (inherent strength of the shape) has been compromised.
I don't know what you paid for that frame but I don't think it's safe to ride. I wouldn't ride it.
But what do I know ?
/markp