How many diameters of seatpost do we need?!?

Kafkaesque
Kafkaesque Posts: 45
edited July 2009 in MTB general
Really keen by the SDG carbon seatpost / bel air SL saddle from Merlin. But on checking my seatpost is 31.4mm, not 31.6mm.

It doesn't appear that SDG even make a 31.4mm seatpost. Why have 2 sizes .2 of a mm apart anyway? Not to mention a 26.8, 27 and 27.2 mm... for roadbikes I assume.

Tempted to get it anyway and sand it down for fit :twisted:

Comments

  • Si78
    Si78 Posts: 963
    My seatpost is 27.2. Not just for road bikes.
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  • supersonic
    supersonic Posts: 82,708
    It would be useful to have some standardisation, but many frames tubes are finely hones for the correct charecteristics the designer wants. Maybe 5 or 6 sizes would do.
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  • nicklouse
    nicklouse Posts: 50,675
    so what is wrong with a shim?
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
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  • Kafkaesque
    Kafkaesque Posts: 45
    Would think it difficult to shim a 31.6mm post into a 31.4mm frame...
  • Kafkaesque
    Kafkaesque Posts: 45
    And we're talking a fifth of a mm here, less than half as thick as one of those mechanical pencil leads :D
  • snotty badger
    snotty badger Posts: 1,593
    Bodge it with a beer can 8)
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  • nicklouse
    nicklouse Posts: 50,675
    Kafkaesque wrote:
    Would think it difficult to shim a 31.6mm post into a 31.4mm frame...

    What?

    you would use one of the smaller sizes like 27.2mm 30.9mm

    i dont see the problem.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • Kafkaesque
    Kafkaesque Posts: 45
    Sorry, I'm being dense. The deal only applys to the 31.6mm size, or rather I should say applied cos I just checked and it's gone. No more problem ! :lol:

    It was a good deal though, I-beam carbon post and saddle for £54.95, the post by itself is £75 at Chain Reaction, and the saddle £50.

    They still have the alloy version for £29.95 if anybody's interested:

    http://www.merlincycles.co.uk/bicycle-s ... addle.html
  • nicklouse
    nicklouse Posts: 50,675
    i wonder why it was a deal? case not many use that size.

    :roll:
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • Kafkaesque
    Kafkaesque Posts: 45
    Back to my original comment!

    Not quite as bad as mech hangers I'll admit

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