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Thrustvector in reply to @dangeek

Heat treatment doesn't (substantially) affect Young's Modulus does it? So the 31.8 is stiffer.

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gbj_tester in reply to @Thrustvector

So the 31.8

FWIW, a 31.8mm OD tube only needs a wall thickness of 2.2mm to be as stiff as a solid 26.0mm bar. A 31.8mm OD tube with a wall thickness of 1.6mm is as stiff as a 26.0mm OD tube with a wall thickness of 4mm

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