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  1. #1
    calicross
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    seat tube diameter

    what is the outside seat tube diameter of a cannondale xs800 inside is 27.2 thank you ...wayne

  2. #2
    Grasshopper wetjett01's Avatar
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    just add the tube material thickness twice the the ID to get the OD
    "Without a care in this whole world,
    Without a care in this life,
    Itís what you take that makes it right."

  3. #3
    calicross
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    thanks wettjett01 that would work if i new the thickness

  4. #4
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    Why do you need to know the OD of the tube?

  5. #5
    Senior Member sydney's Avatar
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    ^^^...isn't it usually to pick correct FD clamp size?

  6. #6
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    Quote Originally Posted by sydney
    ^^^...isn't it usually to pick correct FD clamp size?
    Nice one. I didn't think of that.

    Here's one way: Take some string, wrap it around the seatube, measure cirumference. Divide by 3.14 to get diameter.

    Or find/buy/borrow a caliper.

    Taking it to a LBS would also be very easy.

  7. #7
    calicross
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    yes the outside of the seat tube BostonFixed and your right sydney

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