SMS aka Steven M. Scharf wrote:
[...]
Carbon frames that large tend to have problems of too much flex, which
is what the reviews of the 64cm Madone found. Colnago seems to have
solved this problem in their carbon fiber frames and they go up to 65 cm.

The larger CFRP frames being too flexible is just poor engineering, and
has nothing to do with the inherent properties of CFRP.

--
Tom Sherman - Holstein-Friesland Bovinia
The weather is here, wish you were beautiful