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  1. #1
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    Reputation: vizsladog's Avatar
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    Looking for a 31.6 seatpost that has some flex for my hardtail build.

    Building a carbon hardtail and want a carbon post that is light with some flex without braking the bank.

    Any thoughts on a27.2 with a shim for more flex?

  2. #2
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    Looking for a 31.6 seatpost that has some flex for my hardtail build.

    Shimming a 27.2 is not a good idea, it increases stress on your frame. Also, if the seat post isn't flexible to begin with, you gain nothing. There are 31.6 flexible seat posts such as the Syntace HiFlex P6. I'd look into one before shimming a post that doesn't fit on the theory that a thinner post is more flexible.

    JM2C.

  3. #3
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    Aren't the niner rdo ones super flexible?

    Sent from my SCH-I535 using Tapatalk 4

  4. #4
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    Ok thanks for the heads up. The syntace looks really nice but out of my price range. I'm looking for something under 100.00 any aluminum light ones that flex?

    The rdo is nice but pricey also

  5. #5
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    Not that I am aware of. Niner RDO is money.
    Geologist by trade...bicycle mechanic (former) by the grace of God!

    2012 Specialized Stumpy EVO 29 HT

  6. #6
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    Reputation: rockyuphill's Avatar
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    A flexy aluminium post is generally a short lived post. Aluminium fatigues when it flexes.

    A smaller seatpost and a shim can work fine as long as the shim is at least 4" long, that's the amount of insertion that most seatpost and frame manufacturers require for insertion overlap. Many of the seat post shims are only 2.5" - 3" long, and that isn't enough for either the frame or seatpost.

    Even Scott supplies 4" long seat post shims with their Genius LT bikes to allow a 34.9 seat tube ID to use a 30.9mm dropper post.

    Mind you, flexy carbon seatposts aren't any cheaper in 27.2 than they are in 31.6 size
    I'm a member of NSMBA and IMBA Canada

  7. #7
    eBiker
    Reputation: Mr.P's Avatar
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    Get a cheap @ss & light 27.2 with a shim and enjoy a bit of the reduction in harshness. Your thinking in the right direction.

    Even my shimmed down 27.2 Gravity Dropper more compliant than a 30.9 straight post. (4 years of fun!)

    P

  8. #8
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    Thanks for the input. Wasnt thinking 27.2 would be cheaper jus have more flex.

  9. #9
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    I also think into one before shimming a post that doesn't fit on the theory that a thinner post is more flexible.*********************l/ii6iY[/img]

  10. #10
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    this seatpost test article was shared in the 29er components thread, a good read:
    From the pages of Velo: Getting the most from your post - Page 3 of 5 - VeloNews.com

    This Sette claims vibration dampening, is about $50 and comes in 31.6x 400, I can't find any reviews on it, it's not super light either, -but it is cheap!
    Sette Edge Carbon Seatpost | Sette | Brand | www.PricePoint.com

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