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  1. #1
    Senior Member calstar's Avatar
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    "Fairly large" frame, who built it??

    Yao Ming, ex-NBA all pro, 7'6", 340(+-). Nice looking design, anyone know who built it? I know the photo angle accentuates the size/scle, but nevertheless that is a big bike!

    thanks, Brian


    http://i.imgur.com/6FP9d.jpg
    Last edited by calstar; 04-29-12 at 12:38 PM.

  2. #2
    Still spinnin'..... Stealthammer's Avatar
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    Last edited by Stealthammer; 04-29-12 at 01:11 PM.
    Just your average 'high-functioning' lunatic, capable of passing as 'normal' for short periods of time.....

    “The difference between genius and stupidity is; genius has its limits.” - Albert Einstein

    “We all know that light travels faster than sound. That's why certain people appear bright until you hear them speak.” - Albert Einstein

  3. #3
    Still spinnin'..... Stealthammer's Avatar
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    Just your average 'high-functioning' lunatic, capable of passing as 'normal' for short periods of time.....

    “The difference between genius and stupidity is; genius has its limits.” - Albert Einstein

    “We all know that light travels faster than sound. That's why certain people appear bright until you hear them speak.” - Albert Einstein

  4. #4
    Decrepit Member Scooper's Avatar
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    It's a custom built Gunnar Rockhound MTB frame with 29" wheels built with True Temper OX. The fork was made by Vicious Cycles.
    - Stan

  5. #5
    Framebuilder
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    Yao must really like to do wheelies.

  6. #6
    Randomhead
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    the Waltworks rant about this bike was a good read

  7. #7
    Senior Member calstar's Avatar
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    Quote Originally Posted by unterhausen View Post
    the Waltworks rant about this bike was a good read
    Yes indeed. Thanks for the link, my initial response was obviously incorrect as far as the design, always great to learn from another perspective.

    Brian

  8. #8
    Randomhead
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    it's certainly worth discussing. I wonder if he ever used it much

  9. #9
    Decrepit Member Scooper's Avatar
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    All I got out of Walt's rant is that he'd have done it differently and some of the reasons he would have done so. There's more than one way to skin a cat.
    - Stan

  10. #10
    tuz
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    Yeah hard to tell how it would actually ride by looking at a picture. On the road it's probably okay. But those chaintays do look quite short, and I don't get what the crossed top tubes try to achieve.
    homebuilt commuter, mixte, road and track (+ Ryffranck road)
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  11. #11
    Randomhead
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    I think they had to do something to keep that huge front triangle from racking. The crossed top tubes might not have been the best thing, but it does reduce the bending moment on the head tube. As Walt notes, the steerer could be a problem anyway.

    I do think the chainstays are too short, maybe not 200mm short though. I hate climbing hills enough without doing wheelies. That bike has to be a wheelie machine.

  12. #12
    Decrepit Member Scooper's Avatar
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    It would be interesting to know what input Yao Ming and/or the Gunnar dealer fitting him had into the design. I know from personal experience that Waterford typically solicits lots of customer input when designing custom frames; their stock geometry charts are fairly conventional.
    - Stan

  13. #13
    Senior Member ftwelder's Avatar
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    hysterical.
    1886 Surrey machinists Invincible, 1900 Nashua, 1937 Raleigh Golden Arrow, 1938 Raleigh Silver Record, 1951 Armstrong tourmalet, 1970 Motobecane Grand Record, 1971 Raleigh Professional, 1971 Gitane TDF, 1972 Legnano Gran Primio, 1973, Peugeot PX-10, 1975 Roberts, 1984 Battaglin Giro, 1985 Grandis Speciale, 2012 FTW

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  14. #14
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    The rear end geometry is odd, unless there is something in particular we don't know about. I am also anti set-back seat posts, though they have their place. A 2.5 inch tube would be 8 times stiffer, and the dude isn't even that heavy. I was near that at one point when I toured without difficulty on 1.125 downtube, the old oversize.

  15. #15
    Andrew R Stewart Andrew R Stewart's Avatar
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    scan0088.jpg
    Quote Originally Posted by MassiveD View Post
    The rear end geometry is odd, unless there is something in particular we don't know about. I am also anti set-back seat posts, though they have their place. A 2.5 inch tube would be 8 times stiffer, and the dude isn't even that heavy. I was near that at one point when I toured without difficulty on 1.125 downtube, the old oversize.
    MassiveD- Yes there was a time that 1" down tubes were the standard here in the USA... That just goes to show that we work with what we have.

    One of the issues with very tall/long bikes is that the leverage is so much greater. A tall skinny guy flexes a bike more then a small stocky guy.

    Here's a shot of a 70+ cm frame I built back in 1985. It took a lot to get my boss to use my suggestions of a straight gauge thick wall down tube and a custom machined steerer, also of thicker wall then usual. These days i'd go about this completely different. Andy.

  16. #16
    Randomhead
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    I guess if you count Huffys, they had 1" downtubes. But the standard size DT is 1 1/8", just ask Klein, he patented bigger tubes after getting the idea from one of his professors. My tandem was the first bike I ever built with OS tubing, the DT on that is 1 1/4 using Reynolds 531 tandem tubing that was available back in the early '80s.

  17. #17
    Andrew R Stewart Andrew R Stewart's Avatar
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    Most of the USA production used 1" main frame tubes at one time. Schwinn, Columbia, Murray, Huffy, Ross to name the biggies. Granted most of their bikes were targeting the recreational rider. Cruisers, kids bikes and 3-speeds. But each company had a "lightweight" line with 10 gears too that used the same frame tubes. But then the old guys already knew this. Andy.

  18. #18
    Randomhead
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    I'm old. I guess I always considered the bikes with 1" downtubes to be bike-like-objects since even the cheapest bikes worth owning were built with what is now called "standard" size tubing.

  19. #19
    Andrew R Stewart Andrew R Stewart's Avatar
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    Eric- My post is part of my never ending attempt to base discussions with the history of how things are done at that time and how things evolve but then the old is forgotten. In enough time the current design standards (OS and XLOS tubes, sloping top tubes, ect) will be also forgotten. Until some stick in the mud guy, like me, mentions that people used to think the new bikes that were able to coast were an unfair advantage... Smiles, Andy.

  20. #20
    Charles Ramsey
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    Does anyone know if the frame Cannondale built for Shaq is still in use?

  21. #21
    Decrepit Member Scooper's Avatar
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    Quote Originally Posted by Charles Ramsey View Post
    Does anyone know if the frame Cannondale built for Shaq is still in use?
    That's Doctor Shaq now. He earned his PhD in education last Saturday at Barry University in Miami.
    - Stan

  22. #22
    tuz
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    Regarding the Gunnar. I figured they wanted to strengthen the large front triangle with the crossed top tubes, but it seems they are weakening it? Having those tubes land in the middle of the unsupported seat and head tubes would increase the bending moment? (plus the seat tube is smaller dia then the tubes mitred to it, can't be good) The crossing does create smaller triangles, but not were it's needed I'd say.

    Talking of smaller DTs. I'm working on a 1937 CCM... it has a 1-1/16 DT and ST. Serious wtf moment...
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