Originally Posted by
canuckbelle
I agree. When I went for an aero frame, I went with Scott's HMF rather than HMX frame. The latter is *slightly* lighter (and perhaps *slightly* stiffer) but WAY more expensive.
I think generally, they use more higher modulus carbon on key locations like head tube or bb in order to achieve the same stiffness with less material, so it's mainly a weight thing. Also stiffer doesn't always mean better. I recall a study where 2 out of 3 sprinters were faster riding flexing frames. I don't really notice tbh