Exactly - because "rifling" in bike tubing DOES NOT EXIST!!! No bike tubing EVER has been rifled. That's why I said that he was using the term "rifling" improperly, and he likely meant that it was either splined or butted. But, he used the generalized term "rifling" which, again, does not exist in bicycle manufacturing; but a layperson may use the generalized term "rifling", if they do not know what splining or butting is. I inferred that he meant either splining or butting because, again, rifling bicycle tubes is a fairy tale. Seriously, apply some critical thinking or, you know, read before you type.

Also, do you think that the type of "rifling" in gun barrels is the only type of rifling in the world? ROTFL!!! And, don't look down a gun barrel - a lot of stupid people have died that way.