seatpost size help..............

epo-aholic
epo-aholic Posts: 1,414
edited April 2010 in MTB buying advice
hi guys,

looking for some advice regarding the size of my current post.

i have a 2008 trek 9.8 and the post that came with it is 330mm long and model is the bontrager x-lite carbon aac.

does anyone have an idea of the diameter, its either a 30.9 or 31.6.

any help gratefully received.

cheers :D
Winter/training bike build....

Comments

  • submityournentries
    submityournentries Posts: 912
    it should say on the seatpost itself, somewhere down below the minimum mark
    Ragley Blue Pig
  • epo-aholic
    epo-aholic Posts: 1,414
    submityournentries wrote:
    it should say on the seatpost itself, somewhere down below the minimum mark

    i'd have thought that too...........but it doesn't! :cry:
    Winter/training bike build....
  • abarth_1200
    abarth_1200 Posts: 370
    I was in the same situtation as you I even measured my original seatpost, it is very hard to measure the diff between 30.9 and 31.6 thats 7mm but if you measure and come out at what you think is 31.2 or 31.5 thats not so easy.

    In the end I got a hold of a vernier guage and my original measurement was wrong, I needed a 30.9 and I would have been knackered if I got the bigger size.

    Get a vernier guage and measure accuratly is what Im trying to say.

    If it helps 2 Treks I owned used 31.6 seatposts but check for yourself.
  • Foll Zofalot
    Foll Zofalot Posts: 204
    All my Treks (from 2006-2008) have got 31.6 (not sure if that helps either!)
    White Beastie
    The Treks
    Moi
  • nicklouse
    nicklouse Posts: 50,675
    never known a seat post with out a size on it.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • epo-aholic
    epo-aholic Posts: 1,414
    nicklouse wrote:
    never known a seat post with out a size on it.

    woohoo,. a rare seatpost - must be worth a few ££££'s then!

    anyone want to buy it??? :D
    Winter/training bike build....
  • nicklouse
    nicklouse Posts: 50,675
    epo-aholic wrote:
    nicklouse wrote:
    never known a seat post with out a size on it.

    woohoo,. a rare seatpost - must be worth a few ££££'s then!

    anyone want to buy it??? :D

    or a cheap one :wink: even the one offs tend to be inscribe in the inside and the carbons marked.

    by 9.8 i guess you are on about the Elite model?

    also as that Post only comes in 2 sizes I would not have thought it would be to hard to work out if it was 27.2 or 31.6mm

    this is the carbon/ally post?
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • epo-aholic
    epo-aholic Posts: 1,414
    nicklouse wrote:
    epo-aholic wrote:
    nicklouse wrote:
    never known a seat post with out a size on it.

    woohoo,. a rare seatpost - must be worth a few ££££'s then!

    anyone want to buy it??? :D

    or a cheap one :wink: even the one offs tend to be inscribe in the inside and the carbons marked.

    by 9.8 i guess you are on about the Elite model?

    also as that Post only comes in 2 sizes I would not have thought it would be to hard to work out if it was 27.2 or 31.6mm

    this is the carbon/ally post?

    Worked it out last night it has to be the 31.6 model as bonty dont do a 30.9 and it wouldn't fit in my 27.2 CX frame - so job done and new post ordered!

    cheers for all your help guys! :D
    Winter/training bike build....

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