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  • Elevated chainstays actually decrease BB stiffness as you only have the down tube supporting the BB.

    Which is why elevated stay bikes used bigger diameter tubing to support the BB...downhill bikes have used unsupported BB's for years with no problem.
    A skinny tubed frame with chainstays will still have more BB flex than an elevated stay bike with large diameter tubing.
    Seemed to work fine for Graham Obree. :)

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