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  1. #1
    Newbie dzimney's Avatar
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    Dec 2009
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    Portland, OR
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    IRO Mark V Pro, Surly Long Haul Trucker
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    13/16 Tandem Seatpost (front w/ stoker stem)

    So I've got this old tandem frame that takes 13/16 seatposts, which I don't have. I've got a pair of 13/16 posts, but not one for the front seat that has the stokers stem.

    Does anyone know where I might be able to find one? OR, does anyone have any brilliant ideas on how I might get a stoker stem fitted onto the 13/16 seatpost? To my knowledge, these measure about 20.2mm which is about 4mm too thin for any stoker stems I've seen.

    Thanks all!

  2. #2
    Senior Member zonatandem's Avatar
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    Dec 2003
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    Tucson, AZ
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    ariZona carbon fiber tandem & single
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    Shims or seat collar?

  3. #3
    Older I get, Better I was velonomad's Avatar
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    Nov 2003
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    Schenectady NY & Wilmington NC
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    a bunch of them, most made by me, a couple made by others
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    quick and dirty would be to use the longest threadless headset BMX stem you can find. BMX handlebars are 22.2 use the handlebar clamp for the seat post end. use the 1"(25.4) stem end for a handlebar. install it upside down

    BTW you have half the frame builders in the USA right there in Portland it would be easy to have someone fabricate a stem.

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