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  • In theory which is stiffer: a heat-treated 26.0mm bar or a non heat-treated 31.8mm bar?

  • 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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