Originally Posted by
Nessism
...and you know this how?
Because aluminum frames with thin and flexible tubes have been manufactured in their thousands; see above for the example of the classic Vitus aluminum race frames, but there are dozens upon dozens of other examples. You see, part of actually knowing what you're talking about is having a historical and informational context against which stupid generalizations (like yours) can be tested.
Originally Posted by
Nessism
Almost every Al frame in the marketplace uses thick large diameter tubes to reduce flex in the interest of reducing frame fatigue.
As I said before, this is false, incorrect, a foolishly ignorant statement, however you want to put it. Most of the aluminum bikes that riders have experience with are road bicycles, typically race bikes. And most of these are built with large-diameter tubes because riders of these bicycles like a stiff frame. However, there are also aluminum frames out there built with different design goals in mind, and those... frames... flex. Sometimes a lot. Is this getting through, yet? Rigidity is NOT necessary for aluminum frame life.
Originally Posted by
Nessism
Are you suggesting that almost every Al frame builder/tubing manufacturer/OE builder doesn't know what they are doing?
No, I'm suggesting that you don't have the slightest clue of what you're talking about.