Originally Posted by
tomato coupe
An empty tube is a horrible model for the side-to-side motion of a bottom bracket. Not even close.
Sorry, I thought you were asking about the steel itself. Mea Culpa, my bad, whatever.
And you still haven't answered the question of why this number that you're demanding is relevant to the question at hand. Do you think there is some frequency domain mechanism at work that would make "flex wastes energy" a true statement? Like, what... phase cancellation? Resonant heating, like a 3 Hz microwave? Harmonic distortion in the rider's 5th chakra?
In other words, do you actually have a point to make at all?
--Shannon