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  1. #1
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    New question here. Need help choosing steel tubes

    Hello

    I am a complete noob starting a project and in need for some advice. The idea is to build a tough enduro hardtail steel frame and I am trying to sort out the tubing.

    Right now I am inclined to go with the thickest Reynolds 631 I can get for the main triangle and 525 for the seat and chainstays.
    For the headtube, I wanted it to be tapered for a zero stack headset but I can only find the 44 mm straight headtubes. Where can I find the headtube I want?
    BTW, I am planning on TIG welding.

    Does this sound ok to you? What would you change?

    Thanks. Any input is welcome. :thumbsup

  2. #2
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    Re: tapered Head Tube.

    Columbus make these and can be purchased from Nova Cycles or Ceeway. If you have good metal skills, doing the taper miter for the DT/HT joint will be a challenge, if you are a noob, and skill level is low, stay with the 44mm. If you do not get the jointing really precise, the Tig will pull your work piece out of shape badly.

    Eric
    If I don't make an attempt, how will I know if it will work?

  3. #3
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    Quote Originally Posted by Eric Malcolm View Post
    doing the taper miter for the DT/HT joint will be a challenge
    Haven't really thought about that. Thanks for pointing it out.

    What about the reinforcement rings? Do you have any suggestions from where I should get them? Can they be tig welded too or only brazed?

  4. #4
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    Solidbikes!

    They make a great tapered headtube as well as nice reinforcing rings for a variety of things. Check 'em out!

    Solid Bikes ? Products

    -Walt
    Waltworks Custom Bicycles
    Park City, UT USA
    www.waltworks.com
    waltworks.blogspot.com

  5. #5
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    Quote Originally Posted by Amukinado View Post
    For the headtube, I wanted it to be tapered for a zero stack headset but I can only find the 44 mm straight headtubes. Where can I find the headtube I want?
    BTW, I am planning on TIG welding.
    I think what your asking for is a 44mm head tube with internal or in-set bearing that can take a tapered steerer tube ?

    I too strongly suggest Solid's products as Walt suggested but I think that isn't that HT your asking for as it's a tapered HT designed for external press in bearings .

    For what your looking for the 44mm steel HT from Paragon will be your best bet .
    You will have to run a external lower cup to go tapered . The reason I suggest the Paragon HT is wall thickness for your enduro as it sounds like your making a more aggressive use bike . Hope this helps
    Follow me on Instagram for up to date build pics -Brad4130
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  6. #6
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    I will third the recommendation to skip the tapered ht and use a Paragon 44. Henry James also sells straight gauge tubing for 44.

  7. #7
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    Those Paragon headsets look the part, but they have to be reamed after welding. I'll look into that.

    Is the Reynolds 631 110 mm headset too thin for this application?

  8. #8
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    I've used Reynolds 853 head tubes, which is heat treated 631 and it is thinner than both the PMW and the HJ tubing. I can measure if you need the info.
    andy walker

  9. #9
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    Quote Originally Posted by Amukinado View Post
    Those Paragon headsets look the part, but they have to be reamed after welding. I'll look into that.
    *All* headtubes need to be reamed after welding.

  10. #10
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    Unless you really NEED zero stack for some reason, I would go 44mm. Even then, you can run zero stack straight steerer.
    Tweak the geo to account for the bottom headset race.

    Also consider what reamer you have or have access to. Buying a reamer for every headtube configuration isnt really feasible for a hobby builder. Pick one that works for most things and invest in the tooling. 44mm would be a good choice. Doing a 56mm lower requires a new reamer and OS facer. Not cheap.

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