We'll give Zipp the benefit of the doubt that their dimples do actually test faster than the same rim shape without them, but that's not to say that somebody else couldn't come up with a different shape which is faster still and doesn't need a rough surface to work.
They could, other rim manufacturers do.
We'll give Zipp the benefit of the doubt that their dimples do actually test faster than the same rim shape without them, but that's not to say that somebody else couldn't come up with a different shape which is faster still and doesn't need a rough surface to work.