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  1. #1
    Newbie
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    Quick question about Head tube diameter.

    OKay so I am building my first bike (Road fixie/ss) and am ready to order a tubeset.
    I have the tubeset picked out except there are two options for headtube diameter. 31.8 and 36
    I plan an ordering carbon fork with a steel 1 & 1/8" steerer, un-threaded.

    Which diameter should I order?

  2. #2
    Senior Member
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    It depends if you are one of the people who believes they are so powerful that they can bend a 6 inch tube. If so, order the thicker walled tube.

  3. #3
    Newbie
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    I hope you mean the larger diameter tube, because they both have the same wall thickness.

  4. #4
    tuz
    tuz is online now
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    Dec 2006
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    Toronto/Montréal
    My Bikes
    Homemade mixte, track, commuter and road, Ryffranck road
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    for a 1-1/8" steertube you'll need the 36 mm HT.
    homebuilt commuter, mixte, road and track (+ Ryffranck road)
    bla bla blog

  5. #5
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    It should have been easy to figure out if you knew the wall thickness.

  6. #6
    Randomhead
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    there are actually two thicknesses in each size, one for lugs and thicker for no lugs

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