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Thread: mystery tubes

  1. #1
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    mystery tubes

    I received these in a bunch of tubes I bought as a lot.

    MYSTERY TUBES

    Each is marked "3593" and is about 280 mm long with a slight taper. Too short to even be a fork blade or chainstay for a 20" wheel. They seem to be about .8mm thick.

    Does anyone know what they are?

  2. #2
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    My *guess* is that those are unbent unicrown blades.

    The 4-digit number makes it look like they probably were purchased from Kirk at Bikelugs? You might ask him.

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

  3. #3
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    Walt, they are only 11 inches long - too short for a unicrown on anything bigger than a 16" wheel.

    I had the same thought about the numbers, since my tubes from Pacenti tend to come with these mysterious numbers on them, but I didn't find that number on his site. He changes inventory a lot.

    Jim

  4. #4
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    What are the ODs?

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    Clearly you need to turn them into a stool, super beefy rack, chain/seat bridges or some weird part of a truss fork. :P

  6. #6
    RCP Fabrication
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    They are definatly from Kirk, give them a call I bet they will know what the old part numbers are.

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    Yeah, ok, not many US-made 16" unicrown forks out there. Fork blades for a 'bent? Even those are usually 20", right?

    This is a great mystery! Better yet, what are you going to use them for? It should be at least as weird as the parts themselves!

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

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    Fork blades or stays for a BikeFriday?

  9. #9
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    Maybe they're part of a moulton bike frame kit?

  10. #10
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    Quote Originally Posted by briderdt View Post
    Fork blades or stays for a BikeFriday?
    Seems like a good guess:


  11. #11
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    Quote Originally Posted by dr.welby View Post
    What are the ODs?
    They measure about 19mm (~3/4 inch) at the big end, and 12.5 (~1/2 inch) at the small. The wall thickness is about .9 at the big end and 1.1 at the small. They are 280mm long, or ~11 inches.

    There's barely enough material to make a fork for a 20" wheel. Maybe possible if you have some really long dropouts that extend the blades a bit, but I'm dubious about that one.

    Not that I have a better idea!

  12. #12
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    I'll riff on what others are saying and guess fork blades for a Bike Friday Tikit (16")

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    If you don't find a use for them, I may just have an application for them.

  14. #14
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    Quote Originally Posted by jay_ntwr View Post
    If you don't find a use for them, I may just have an application for them.
    Jay, PM me and I'll let you know. I don't see myself using them any time soon and would just as soon make room in the shop.

    Still waiting on a reply from Kirk. He said he'd get back to me this week but I'm sure he has more pressing items on his agenda than answering trivial questions from amateurs.

  15. #15
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    BikeLugs.com

    Found it.
    The awkward description sounded familiar. I've gotten quite a few bmx tubes from Kirk recently as he was closing out all TT stuff. I think I bought some of these just to have...

  16. #16
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    Wheeee! mystery tubes from Kirk! I impulse bought some stuff recently, and threw some cheap HT stock in the order. I just got it to day and looked at the order closer. I've now 3ft of really thick TT S3 Head Tube, beautiful steel.....But the 10.00 the tubing cost won't cover a 10th of the cutters it will go through in using the stuff.
    Slowly slipping to retrogrouchyness

  17. #17
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    Awesome work Jeremy!

    But... these are too short to be seat stays, even for a 20" wheel. Mystery sort-of solved!

  18. #18
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    I'm using them as a seat tube bridge support for low top tube mtb frames. Agreed too.short for bmx frame.use. as noted in the description, perfect for trus designs and bridges...

  19. #19
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    Just reviving this thread to say, I think these are crank arms for BMX cranks.

    Also, Jay, if you still want them, email me (jim at nachlin dawt calm). The PMs seem to have disappeared.

  20. #20
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    Quote Originally Posted by JaquesN View Post
    Just reviving this thread to say, I think these are crank arms for BMX cranks.

    Also, Jay, if you still want them, email me (jim at nachlin dawt calm). The PMs seem to have disappeared.
    Yeah, I still do want them. I'm not sure what's going on with PMs. I'll email you.

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