Which Company makes "best" replica?

[Anthony]

Originally Posted by Silverback51

Not offended at all. I'm glad you pointed out my mistake so I could correct it.

There are other significant differences as well, such as the cross members, number of them, and how they are placed which I would think significantly affect frame rigidity.

I think CSX4000/Kirkham's have 4 cross members. I don;t know about ERA's, Superformances, and how they they all compare to one another.

I now see you already posted about this.

Originally Posted by Silverback51

--Now this is just basic strength of materials for structural shapes and does not take into account the other structural bracing and such that makes up the frames. The only way to really compare any of these frames to determine which is the strongest would be to build a FEM model and run it through a stress program to determine what is happening when like loads are applied.

Unless one of the above manufactures has actually done this for all three frames, they cannot make any claims that theirs is the strongest.

Yes, the ERA 3 X 4 X .125 tube is the strongest, but that single component does not make it the strongest frame. All it would take would be one series of truss members to make the Kirkham tube assembly 10 times stronger.

Besides, don't beleive everything you read from manufactures (or politicians) as they are all trying to sell you something.

Is that better?

And thank you for challenging my response. I don't get to play with numbers much at work anylonger. Even this simple stuff was kind of fun.

Yes, perfect response. And I don;t believe everything what is told to me from politicians, doctors, and especially lawyers