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hmmmmm...CF DH bike?

Old 06-25-08, 04:01 PM
  #1  
lofnsjoke
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hmmmmm...CF DH bike?


GT just unveiled their new DH bike for 09 made out of 100% carbon fiber the Fury.
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Old 06-25-08, 04:12 PM
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is CF cheaper to make/work with than aluminum? aluminum (although a cheaper material) requires welding and whatnot. for CF, don't you just squirt the goo into a mold?
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Old 06-25-08, 04:18 PM
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BCD bikes has been doing it for a while now, it's nothing new...

http://bcdracing.com/
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Old 06-25-08, 04:21 PM
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Lahar from NZ as well. Done right, it can be durable and good looking.
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Old 06-25-08, 04:26 PM
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Originally Posted by Zan View Post
is CF cheaper to make/work with than aluminum? aluminum (although a cheaper material) requires welding and whatnot. for CF, don't you just squirt the goo into a mold?
No. Its a bit more complicated than that. Carbon fiber acts like a fabric until a process (or air exposure over a long period of time) cures it.
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Old 06-25-08, 04:33 PM
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Originally Posted by TechTrek View Post
No. Its a bit more complicated than that. Carbon fiber acts like a fabric until a process (or air exposure over a long period of time) cures it.
oh okay, cool
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Old 06-25-08, 04:57 PM
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The website said that CF is 10x stronger than aluminum thats probably why they are using it
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Old 06-25-08, 05:04 PM
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Here's the one they built ten years ago

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Old 06-25-08, 05:04 PM
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Originally Posted by giant rules!!! View Post
The website said that CF is 10x stronger than aluminum thats probably why they are using it
Do you know what "strong" means?
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Old 06-25-08, 05:44 PM
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Originally Posted by TechTrek View Post
No. Its a bit more complicated than that. Carbon fiber acts like a fabric until a process (or air exposure over a long period of time) cures it.
Also, all of your molds (inner and outer for pressure-molding, as TechTrek said) have to be custom-machined/turned for each piece that will make up the structure. It's not just like laying up fiberglas cloth.

Here's a bit of detail from Littermag on Alex Morgan's BCD 29er DH bike:

http://www.littermag.com/techno/bcd29er/1.htm
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Old 06-25-08, 06:33 PM
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I thought this was going to be about cannondale's new Moto. Me wanty.
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Old 06-25-08, 06:38 PM
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carbon fiber really has no place in off road frames or components for that matter. it works okay for road frames...but that's about it.

mx
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Old 06-25-08, 07:15 PM
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that, is a beautiful bike.
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Old 06-25-08, 08:00 PM
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Originally Posted by mx_599 View Post
carbon fiber really has no place in off road frames or components for that matter. it works okay for road frames...but that's about it.

mx
Why not?
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Old 06-25-08, 08:02 PM
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Originally Posted by mtnbiker66 View Post
Why not?
hehehe


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Old 06-25-08, 09:59 PM
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I guess aluminum is only ok in road bikes too.
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Old 06-25-08, 10:29 PM
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Originally Posted by M_S View Post
I guess aluminum is only ok in road bikes too.
yeah, definitely. that is why i stopped riding my schwinn and went to a steel cove HT. steel is real!!

mx
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Old 06-26-08, 12:08 AM
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That bike is super horn.

OI see they have a Nomad-esque top tube hump too, nice.
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Old 06-26-08, 03:52 PM
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The GT looks beefy enough to handle DHing, the only thing that always worries me with the CF's is the headtubes snapping off, that will really mess up your face when flying down a hill at 20+ mph.

The seat tube on that GT is less beefy then the one on the other bike (the broken one), that also kind of worries me.
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Old 06-26-08, 04:18 PM
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^^ I know . . . those people who trust their weight to carbon fiber tubes are nutz . . . .



Those #^%^^*%@ CF DH bikes are showing up everywhere:

Alex:



Derek Lahr:



Lahar Bikes of New Zealand:

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Old 06-26-08, 05:34 PM
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oh, can I play?

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Old 06-26-08, 10:37 PM
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I have trusted carbon fiber with my life for the last 11 years. The golden rule of CF (from the leading pole vault pole designer in the world) is that carbon fiber, when taken care of has infinite life. User abuse and neglect is what causes all failures.
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Old 06-26-08, 11:03 PM
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Originally Posted by TechTrek View Post
User abuse and neglect is what causes all failures.
You see, pole-vaulting friend, the crux of our issue here as cyclists is that things like "subjecting the bicycle to disc brake forces" and "riding the bicycle offroad" often constitute "user abuse."
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Old 06-28-08, 12:59 PM
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Originally Posted by Zan View Post
for CF, don't you just squirt the goo into a mold?
Never heard it put that way before - how eloquent.
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Old 06-28-08, 01:07 PM
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Originally Posted by gastro View Post
Here's the one they built ten years ago

That was not carbon though, that was a thermo-plastic (I believe that is the term) frame and were much more brittle then the carbon. I watched a few of them old GT's crack.


Not only is the new GT carbon but so is the new C'dale Moto (only a carbon version will be made for now). Rode one the other day and was at a C'dale demo this morn and this is a very nice ride.




DBD
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