A fork should be laterally stiff while able to dampen out vibrations from the road.
Lateral stiffness is very easily built carbon bicycle frames
into a fork while torsional rigidity is not.
Since the fork is fastened onto the wheel,the ysbike01 hub is a structural member of the fork and therefore easy to achieve lateral stiffness
(much morethan what you feel when you bend a fork with your hands without the wheel attached).
Torsional stresses on a bike aren’t huge,but having a torsionally flexible fork will make your steering seem sluggish on descents or fast corners.
There will feel like there’s a lag carbon bike frames
between handlebar input and bike reaction.
The quality between various forks can widely vary. Most forks these days are monocoque (single piece mold.)
The gold standard of bicyclecarbon TT frames
forks is a brand called THM out of Germany.
What makes THM forks so good is that there isn’t a wasted layer of carbon.Many carbon parts are built with excess carbon layers used as a buffer
to make certain that there are no single points of failure or weaknesses.
They do this instead of doing NDTcarbon wheels
(non-destructive testing) using ultrasound or x-ray which can get expensive and time consuming.
THM eliminate excess material without compromising its lateral rigidity and safety by doing NTD on every single one of their forks. Their workmanship is superb.