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  1. #1
    Senior Member jjciiijs's Avatar
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    I will make it lighter than air!

    I will use the lightest parts i can find. Except for the saddle (I have to have some comfort) and the gears(I have to have enough to get up the hill).

    The question is, which frame is the lightest size to size, and I am talking about a 56cm frame.

    Looks like I will have to use a Sram Red group and ????. Always wanted to build a 15 lb bike.

    Jeff
    Square wheels need not apply

  2. #2
    Senior Member DannoXYZ's Avatar
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    There were sub 2-lb frames made from beryllium... Most carbon frames are +/- 0.5 lbs from each other anyway, so you won't save much weight in frame alone.

    Also, no complete gruppo is the lightest, so you'll have to mix & match. Titanium cassette cogs weigh 1/2 that of steel, but won't last as long. Hollow-pin chains will help. Tubular wheels are about 1.5-2 lbs lighter for the same strength. Carbon bars and stem, seatposts. Heck, the 150gm carbon seats are actually quite comfortable.

  3. #3
    biked well well biked's Avatar
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    Quote Originally Posted by jjciiijs View Post
    Always wanted to build a 15 lb bike.
    If your goal is to build one up from a frame, that's fine, but it would be less expensive to buy a complete bike. Fifteen pound bikes are offered by major bike brands. They're not inexpensive either, of course, but less money than piece mealing one together-

  4. #4
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    Nice to hear the recession's not affecting you!

  5. #5
    Senior Member
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    Litespeed's Ghisallo Ti frame is advertised at 770 grams in a Medium size and 840 grams in ML size. That's 1.69 pounds or 1.85 pounds and they are about the lightest frames I know of that are generally avialable. There are also several carbon frames advertised at <900 grams.

    An Easton EX90 SLX carbon fork is less than 300 grams uncut so that about as light as it gets too.

    None of these are cheap but, if you really want to have a light bike, start here.

  6. #6
    Senior Member Torchy McFlux's Avatar
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    Guy dropped by my shop last year with his Merlin Extralight done up with a custom group. It was about 15 lbs. He said he'd spent about $10,000.

  7. #7
    My bike's better than me! neil0502's Avatar
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    Go nuts:

    http://weightweenies.starbike.com/

    Report back

  8. #8
    Arsehole PlatyPius's Avatar
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    For light weight AND longevity, look at a Litespeed Archon with an Easton EC90 fork. If you REALLY want to spend money, give Crumpton a call.

  9. #9
    Great State of Varmint Panthers007's Avatar
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    A beryllium frame? Good Lord! If they ever caught on fire - it would kill everyone down-range. Even some stray dust from it would likely cause lung cancer.

    Caveat Emptor!!
    How do you keep an idiot in suspense?

  10. #10
    Arsehole PlatyPius's Avatar
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    Quote Originally Posted by Panthers007 View Post
    A beryllium frame? Good Lord! If they ever caught on fire - it would kill everyone down-range. Even some stray dust from it would likely cause lung cancer.

    Caveat Emptor!!
    Almost as scary as Exploding Carbon frames or Spontaneously Combusting Magnesium frames!

  11. #11
    Senior Member DannoXYZ's Avatar
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    Quote Originally Posted by Panthers007 View Post
    A beryllium frame? Good Lord! If they ever caught on fire - it would kill everyone down-range. Even some stray dust from it would likely cause lung cancer.

    Caveat Emptor!!
    It was super-stiff as I recall. A 2-lb beryllium frame is about as stiff as a 15-lb steel frame, or a 10-lb aluminium or 8-lb carbon frame. Only problem is the $50k entry price... in '80s dollars or about $150k today.

  12. #12
    aka Tom Reingold noglider's Avatar
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    jjciiijs, why do you want to do this?
    You don't read my signature anyway, do you?

    Tom Reingold, noglider@pobox.com
    Residences: West Village, New York City and High Falls, NY
    Blogs: The Experienced Cyclist; noglider's ride blog

  13. #13
    Senior Member jjciiijs's Avatar
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    Quote Originally Posted by Torchy McFlux View Post
    Guy dropped by my shop last year with his Merlin Extralight done up with a custom group. It was about 15 lbs. He said he'd spent about $10,000.
    My Merlin Extralight is quite good. I forget the lb on it, but it is not 15 lb. I did not spend 10K on it either, but I have some light stuff and the only thing that would make it lighter is a saddle, TI cassette, and carbon shifters. So perhaps if I did it over I could get there. The addle would be a big thing.

    In fact I like the way it rides and it is in contention with my CIOCC for lightest right now.
    Jeff
    Square wheels need not apply

  14. #14
    Senior Member jjciiijs's Avatar
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    Quote Originally Posted by noglider View Post
    jjciiijs, why do you want to do this?
    I have many bikes from 45 lbs to 16.5 lbs. In riding them i can tell the difference from one to another based on weight alone when going up hill. Since I build bikes for fun (not much of a life) I figure this would be my next project.

    For the guy who posted why not just buy it, It would not take enough time
    Jeff
    Square wheels need not apply

  15. #15
    Senior Member jjciiijs's Avatar
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    Quote Originally Posted by PlatyPius View Post
    For light weight AND longevity, look at a Litespeed Archon with an Easton EC90 fork. If you REALLY want to spend money, give Crumpton a call.
    What is a "Crumpton"?
    Jeff
    Square wheels need not apply

  16. #16
    biked well well biked's Avatar
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    Quote Originally Posted by jjciiijs View Post
    For the guy who posted why not just buy it, It would not take enough time

    Believe me, I understand.

  17. #17
    My bike's better than me! neil0502's Avatar
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  18. #18
    Senior Member
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    Building a sub 15 pound bike is easy these days, if cost isn't a major consideration.

    The UCI has a regulation limiting Pro Tour bikes to a MINIMUM of 6.8 kg which is almost exactly 15 pounds. Getting under this weight is so easy that the teams can use power meters and other weight adding accessories on their race bikes and still be right at the limit.

  19. #19
    aka Tom Reingold noglider's Avatar
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    Quote Originally Posted by jjciiijs View Post
    I have many bikes from 45 lbs to 16.5 lbs. In riding them i can tell the difference from one to another based on weight alone when going up hill. Since I build bikes for fun (not much of a life) I figure this would be my next project.

    For the guy who posted why not just buy it, It would not take enough time
    Your explanation is clear, succinct, and funny. Thank you.
    You don't read my signature anyway, do you?

    Tom Reingold, noglider@pobox.com
    Residences: West Village, New York City and High Falls, NY
    Blogs: The Experienced Cyclist; noglider's ride blog

  20. #20
    Senior Member jjciiijs's Avatar
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    Quote Originally Posted by HillRider View Post
    Building a sub 15 pound bike is easy these days, if cost isn't a major consideration.
    The UCI has a regulation limiting Pro Tour bikes to a MINIMUM of 6.8 kg which is almost exactly 15 pounds. Getting under this weight is so easy that the teams can use power meters and other weight adding accessories on their race bikes and still be right at the limit.
    Well then, I need to get a list of what they are running on their frames just to get started so I can pick my components. Looks like the Lightspeed is the lightest frame so far in 56cm. I was sort of hopeing for a carbon but I like the ride of my TI.
    Jeff
    Square wheels need not apply

  21. #21
    OUTLAW BIKER merckx_rider's Avatar
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    Lighter than air... I get it.
    Careful that it doesn't float away!
    http://www.gotbiz.com/uweb/images/freewebsite_uweb.gif The Creator of Uweb! Worlds Best Online Webpage Editor only available at gotbiz.com
    Free Website for your business at gotbiz.com

  22. #22
    slow as I ever was Ex Pres's Avatar
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    72 special CNC ___________ 72 Frejus (ala Legnano) __73 Holdsworth Record
    78 Raleigh Professional_____ 80 Ranson_____________ 80 unknown French (SS)
    82 Peugeot PXN10_________83 Trek 620 (nee 600)____ 85 Gianni Motta
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    08 BF IRO (fixed)_________09 Dogma FPX magnesium__10 Vassago Fisticuff (IGH)

  23. #23
    Senior Member z415's Avatar
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    It is ridiculous that my cat weighs more than that - need to put him on a diet.
    Falling is learning...[SIGPIC][/SIGPIC]...learn to not fall in a box.
    Any good American will watch THIS -and- WHERE WAS MY BIKE MADE?

  24. #24
    ǝıd ǝʌol ʎllɐǝɹ I JeanCoutu's Avatar
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    You have the essence of a true weight weenie, I would suggest following neil0502's advice and have a look on those forums (the listings are less helpful imo)

  25. #25
    Senior Member
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    Quote Originally Posted by Bob Barker View Post
    IIRC, there was a recent article in VeloNews or similar about a fully rideable bike weighing less than 10 pounds.

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