[Greg Woelki]

Originally Posted by Nate Laverdure

Polar moments of inertia:

AndyMark 1/2" churro tube .00535 in^4  [Solidworks]
1/2" hex bar              .00752 in^4  [Wikipedia]
1/2" round bar            .00614 in^4  [Shigley 8th ed. Table A-18]
VexPro 1/2" round tube    .00570 in^4  [Shigley 8th ed. Table A-18]

While the polar moment of inertia of the churros is decent, not only is it 6063, but also the dimples will cause it to perform poorly in torsion.