Originally Posted by
fietsbob
Actually an aluminum structure, Has to be stiffer to last, so the designers
see to that in the design engineering of the frameset..
the fat thinwall tubes were a design choice to best use the Al,
due to the mechanical properties of that material ..
+1 this. Large diameter tubes offered more weld area to spread the stress better. The "stiffness is a virtue" mantra was developed to help market the frames.