Seat post clamp sizes?

ricktabor1
ricktabor1 Posts: 272
edited May 2011 in MTB workshop & tech
Can anyone tell me how to measure my seat post to get a clamp size?

I have a seat post that fits - the post is 31.6mm.

I'm guessing that a 31.8 mm clamp would be too small cos the tube metal must be more than 1mm thick (or am i wrong).

I'm asking this as i've ordered seat clamps before and always seem to pay out for one that doesn't fit, no matter how hard I measure!!

Any advice would be excellent.
Got to get up to get down

Comments

  • nicklouse
    nicklouse Posts: 50,673
    see the FAQs.

    or tell us what the frame is (and year).
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • ricktabor1
    ricktabor1 Posts: 272
    Thanks Nick

    Ok i checked using the guide on FAQ

    I came up with 34.08 (circumference was 107mm) - so i guess 34.9mm

    The bike is a Trek 3700 2007 (I think).
    Got to get up to get down

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