Originally Posted by
mjac
That is what I am going by. I may be wrong. But no one has been able to show me yet.
You are absolutely right - the advantage is debatable.
But they exist because tubular tires don't come with Shrader valves, and tubular tires are far superior to clinchers.
Clincher wheels come drilled for presta valves for people who want to pretend they have tubulars.