Originally Posted by
Dave Mayer
Hmmm. I've looked at the video a dozen times and cannot see evidence that the root cause of the crash was that DeGent had hit something.
I've hit many many objects while riding tubulars, including fist-sized objects that destroys the rim and flattens the tire in one revolution. Unlike clinchers: no drama. The tire stays put tight on the rim and you coast to a controlled stop. Or if you have less than a mile to the finish, and the rim is not too destroyed, you ride it out.
Unlike that of the the tire and rim vendors, here is an analysis that I trust::
ZIPP Hookless Bike Wheels, A fast track to the Emergency Room!! (youtube.com)
I actually watched that whole video (and understood quite a bit of it), and he makes a lot of sense. I would be interested to hear from others with an engineering background that want's to counter the points he made, but he backed up his opinion with solid engineering.