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  1. #1
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    Advice on strength of cut bike stem needed

    I want to fix a couple of child bike stems to a sack truck to make a trailer. I thought of cuttting down the stems to give a flat profile (I would be cutting vertically down the stem and them removing one half of the stem with a horizontal cut to leave a semicircle profile) to alllow the stem to sit flush with the plates on the sack truck on which I would like to fit the forks, but am unsure as to how strong the stem would be once it is cut to a semicricle profile. Load would be around 40KG.

    Any help appreciated.

  2. #2
    Trail Ninja
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    How about an illustration of your plans here? Having a hard time picturing it.

  3. #3
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    cutting any tube into half a tube makes it essentially useless.
    don't worry about it fitting flat against the plates on the sack truck, it won't last long that way.
    you're eliminating the structure's ability to resist torsion and unless I miss my guess- you're using them as the joints.
    bad place for lack of torsional rigidity.
    If steel is real then aluminium is supercallafragiliniun!

  4. #4
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    Thanks

    Thank for that very clear answer - just what i wanted. Would the same problem be thre if a slot was cut down the centre of the stem so it could be slotted over the plate, my thinkging that if it was the edges were flush with the plate and kept under tension it might work. Otherwise any suggestions as to how I mifght fit them.

    Ian

    Quote Originally Posted by byknuts View Post
    cutting any tube into half a tube makes it essentially useless.
    don't worry about it fitting flat against the plates on the sack truck, it won't last long that way.
    you're eliminating the structure's ability to resist torsion and unless I miss my guess- you're using them as the joints.
    bad place for lack of torsional rigidity.

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