Originally Posted by
Panthers007
[Hydroformed aluminum] also has any air-bubbles driven out which could cause weak-spots here and there. So lighter weight and stronger butted tubing is the difference.
Who told you this???
Hydroforming is cheap and it allows complex shapes - but bubbles in frame materials causing weakness??? No.
http://en.wikipedia.org/wiki/Hydroforming
And hydroformed tubing isn't especially light either.