yup, the Heine test. I dont disagree thst forks flex. I accept thst they flex. The video bike has a French bend on the fork which is, for all intents and purposes, not seen anywhere on production bikes or even handbuilt bikes. That style is so rare it shouldn't be used as a discussion point.

the fork in that YouTube video flexes. Absolutely. And a straight fork at thst same rake would also flex. I doubt any straight forks have 65mm of rake though since that much rake isnt a popular design style, so there is then no test to show the flex.

a 45mm rake(much more common on drop bar bikes) will absorb the same road chatter on a straight blade fork as a curved fork.

as for disc brakes, well there are still curved disc forks, albeit few options.
if the tubing is the same, a straight fork will flex and absorb the same as a curved fork.

the test was basically written about as a passive advertisement for what he sells- kesai tubing.
there were no numbers about rake of each fork. Why not? It was even mentioned in the discussion section, but not addressed again.


well at least i answered my rhetorical question of how this misinformation continues to be repeated- its because of simplistic studies(by an otherwise excellent team who typically sets up fantastic studies) and also because many dont understand the numerous working parts of a comfortable fork.