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  1. #1
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    Invest casting stays bridge

    Hi,

    anyone know where it's possible to find some steel bridges like in the following picture ?



    Thank you

  2. #2
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    Those are hydro-formed Al.
    NOTHING WORKS LIKE CLOCKWORK

    www.clockworkbikes.com

  3. #3
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    Quote Originally Posted by Clockwork Bikes
    Those are hydro-formed Al.
    I took this pic from the Flybikes website, and they said "invest casting stays bridge"...

    http://www.flybikesbmx.com/frames/pr...erra_info.html

    Anyway, is there a way to get this kind of tubes ?

  4. #4
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    Call them

    I have never seen anything even vaguely like that in steel. I imagine calling Fly bikes would be step #1 in finding out if you can get some.

    FWIW, they look like aluminum to me.

    -Walt

    Quote Originally Posted by PiR products
    I took this pic from the Flybikes website, and they said "invest casting stays bridge"...

    http://www.flybikesbmx.com/frames/pr...erra_info.html

    Anyway, is there a way to get this kind of tubes ?

  5. #5
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    I imagine calling Fly bikes would be step #1 in finding out if you can get some.
    I really doubt they'll help me. I already contacted them few years ago concerning a new product idea, but they don't consider ideas that don't come from her company. I know their frames are made in Taiwan, so they probably never had this tube in hand, or maybe the prototype...

  6. #6
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    Why not just turn some on a lathe? Design looks simple enough to copy. Start wit ha solid rod profiling the outside as you wish. One satisfied you could bore a hole down the center if your concerned about weight. Just a thought

  7. #7
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    Quote Originally Posted by crux
    Why not just turn some on a lathe? Design looks simple enough to copy. Start wit ha solid rod profiling the outside as you wish. One satisfied you could bore a hole down the center if your concerned about weight. Just a thought
    Yes, but I would like to made a quantity of 50 or more...and I think it's too much time consuming...

  8. #8
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    Um, k...

    So have a machine shop do it for you.

    -Walt

    Quote Originally Posted by PiR products
    Yes, but I would like to made a quantity of 50 or more...and I think it's too much time consuming...

  9. #9
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    The welds on that bike certainly do not look like aluminum to me. The wonderful website for Fly bikes doesn't mention a material spec either.

  10. #10
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    Quote Originally Posted by customfab
    The wonderful website for Fly bikes doesn't mention a material spec either.
    Fly frames are all 4130 of some kind, although they tend to just be listed as CRMO in the catalogues.

    I don't know of any non-racing BMX brands that do alu frames. If you're lucky you'll get a name brand and some butted tubes, but mostly they're all about plain gauge steel.

    OT:
    Ragleys have cast chain stay bridges this year, can't promise Brant will tell you who's making them but it can't hurt to ask him.

  11. #11
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    Not exactly what is pictured, but very similar in shape. I have never used them, so I can not speak to their dimensions. A phone call to Nova might be in order.

    http://www.cycle-frames.com/bicycle-...AY-BRIDGE.html
    http://www.cycle-frames.com/bicycle-...AY-BRIDGE.html
    Beechwold Cycle Works
    Columbus, OH
    http://beechwoldcycleworks.blogspot.com

  12. #12
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    Quote Originally Posted by pyranha
    Not exactly what is pictured, but very similar in shape. I have never used them, so I can not speak to their dimensions. A phone call to Nova might be in order.

    http://www.cycle-frames.com/bicycle-...AY-BRIDGE.html
    http://www.cycle-frames.com/bicycle-...AY-BRIDGE.html
    Thank you for your help, but I already have both of them and they are terribly small, something like 25 mm long...

  13. #13
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    Long Shen is the caster of choice for IC bike parts. If you wanted something like that done, they'd be the people to talk to. They'd sell too, because they're a nice design.

    http://www.longshen.com.tw/
    No longer member of the bike industry nor society, so don't hassle me.

  14. #14
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    Draw the part, submit to emachineshop.com and be done with it. Getting anything cast will be many thousands of dollars.

    -Schmitty-

  15. #15
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    OHMYGOD, Schmitty. I never knew of eMachineShop. Thank you for the enlightenment.

  16. #16
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    BMX rider here. Fly frames are dope. They are all Cromo and investment casting is becoming big these days. We The People uses some cast parts too like on the C.R.E.A.M. frame:
    http://www.wethepeoplebmx.de/signatu...es/cream-frame

    http://prollyisnotprobably.com/2011/...vestment_c.php
    My motorcycle runs on infant blood

  17. #17
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    Quote Originally Posted by Schmitty
    Draw the part, submit to emachineshop.com and be done with it. Getting anything cast will be many thousands of dollars.

    -Schmitty-
    I didn't know this site. The idea behind the site is really good. It's a shame their software is so poor and I talk as a Dassault System (CATIA & SolidWorks) teacher.

    Anyway, I made a simulation for 50 pieces and the price is 14 $/bridge and 11 $ for 100 pieces. It's a bit expensive, but could be worst...
    Last edited by PiR products; 02-23-2011 at 06:03 AM.

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