Originally Posted by
dsaul
It doesn't make them more flexible.
As someone who broke 2 teledyne titans at the bb, it makes it real flexible when the tubes crack and the cracks are more than half way round the seat tube. But it isn't noticeable for far longer cracks than most people would imagine. Which is funny in the context of this thread, as if a little overheating is going to make a noticeable difference in stiffness.
This reminds me of my consulting deal. $20 and I'll tell you what you want to hear. Want someone to tell you your bike is getting old and less stiff so you need to buy a new one? $20 and I'll write you a letter signed by a Ph.D. mechanical engineer. I should raise my rates.