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  1. #1
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    S-Bend Steel Down Tube: Good Idea Or No?

    Hi Guys,

    I'm looking at getting a steel 29er frame built and was going to request an S-Bend type curve at the headtube end of the down tube for fork clearance but I have been told that it will create a weak point. I know the new Niner Sir 9 has a bend there but I guess they have a specially butted down tube? I would be using a plain gauge cro-mo down tube. So am I just asking for trouble?

  2. #2
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    Consult with your framebuilder and trust their advice if you are trusting them to build your frame. Why cheap out for plain-gauge tubing on a custom built bike? Plain gauge that is thick enough to be bent and welded on the ends will be unnecessarily heavy for the middle. Pre-bent down tubes are available from Nova;
    NOVA CRMO 38mm DOWNTUBE FOR MTB/29er WITH BEND :: 38.1mm DOWN TUBES :: ROUND TUBES :: MAIN TUBES :: TUBES STEEL :: Nova Cycles Supply Inc.

  3. #3
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    Thanks for the advice and the link GrayJay.

  4. #4
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    The one used by Niner (or very similar) are also available direct from Reynolds...

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