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They're Serious...(22 posts)

They're Serious...Akirasho
Oct 27, 2001 8:18 PM
http://www.griffenbike.com/xtc.htm

We abide.

Remain In Light.
?????mickey-mac
Oct 27, 2001 8:23 PM
That almost makes me embarrassed to say I own one of their mountain bikes. At least mine is pretty traditional looking. This think looks like a Las Vegas hotel on wheels. Truss construction?
umm...metonymy3
Oct 27, 2001 9:36 PM
Interesting...

Seems like a half decent idea, you get an extremely wide aero teardrop tube, but very light because most of it is chopped out. All I can say is maybe, just maybe, it really works. Probably just a gimmic though.

But it's just so ... UGLY!
what a drag!jacques
Oct 28, 2001 2:18 AM
That seat tube may be light, but it has to have the aerodynamic drag coefficient of a gothic cathedral. Reminds me of the 1970's drill-out frenzy: lots of holes, lots of drag.
it seems the holes are covered with clear plastic. nmBruno S
Oct 28, 2001 4:21 PM
great engineering project . . .jacques
Oct 28, 2001 2:22 AM
. . . in how to disrupt smooth airflow. That seat tube may be light, but it has to have the aerodynamic drag coefficient of a gothic cathedral.
sorry for the (quasi-)double post (nm)jacques
Oct 28, 2001 2:25 AM
Maybe notDave Hickey
Oct 28, 2001 3:02 AM
It looks like the holes are covered with a clear Mylar. It's still ugly
In that case . . .jacques
Oct 28, 2001 3:30 AM
. . . it would make a lot more aerodynamic sense. BTW, is the down tube trussed as well? The background leaves don't show through the down tube "cutouts."
But,TJeanloz
Oct 29, 2001 9:05 AM
Wouldn't the mylar constitute a 'fairing' and be illegal? It would be a tough argument that the mylar is necessary for the structural integrity of the bike.
re: They're Serious...NEW SUBJECTcapnjim01
Oct 28, 2001 5:29 AM
sorry tried to post new message but had to jump in here. just recieved new stock profile of smith&wesson new product. it seems they have decide to make a 357 magnum out of scandium. they say that the revolver does flex some and the gun is so light that recoil is noticeable. i'll bet. only weighs 11 ounces could be the ultimate acc. for the problem of drivers messing with riders lol. they are trying to market this as something for airline pilots to defend themselves. if you have doubts about the life of a scandium frames think about a 125grain hollow point at about 1200fps. i know this is a bike forum but i found this interesting.
I wonder how long that mylar lasts?filtersweep
Oct 28, 2001 5:53 AM
Imagine it torn or stretched... envision the sound of it flapping in the wind... imagine a hole in the mylar, wind whistling through the frame...
I wonder how long that mylar lasts?Bruno S
Oct 28, 2001 4:25 PM
Its very strong but it scratches easily. I would have painted it from the inside (like helmets) to conceal all the scratches it will get. Maybe for the prototype they chose clear to show the construction.
... and is relatively easy to repair...Akirasho
Oct 28, 2001 5:54 PM
It would depend on the mil (thickness) and type, but versions of the material are used in model aeronautics, with an adhesive backing, that can be shrunk fit (with a hairdryer) to provide a smooth surface... easy to repair in the field.

I'm guessing, as Bruno S points out, that Griffen is showing this version mainly to showcase the truss construction... I'd opt for an opaque scheme.

Before I got my Cervelo P2K, the original version of this bike was on my short list... still kinda pricey... Wonder how Paula Newby-Fraser affords her's???

We abide.

Remain In Light.
It's pretty tough, used for windsurfing sails. . .js5280
Oct 29, 2001 10:29 AM
Mylar holds up pretty well unless you poke a sharp object into it. They use it for windsurfing sails which take quite a beating (at least when I sail them and get catapulted).
Sort of....grzy
Oct 29, 2001 11:18 AM
Un-reinforced mylar sails are a disaster in the surf. Then there's the scratching aspect and the break down under UV. I've destroyed more than my share - plus I've gone through a totally reinforced Ezzy Wave sail - and they're supposed to bomb-proof - tore it completely in half and didn't get hurt.

At the end of the day one has to ask themsevels what's the point of machining out a truss for a bike frame. It isn't cost effective, I'll bet it's not light. Sort of the dog and his balls thing.
Personaly, I kinda like it.vanzutas
Oct 28, 2001 6:31 AM
I think it seems like a good idea. I don't know about ride quaility or efficiency from one picture. But I like to see something different and maybe it really works.

Who cares if it is ugly, I only care if it is fast.

Adam
It's kinda funny...MikeC
Oct 28, 2001 7:44 AM
that on their Web site,under the photo, they've made a typo and changed the name from the Vulcan XTC to the Vulvan XTC.
Sorta generates a whole different set of connotations... ;)
Just think of all the things you could store/carry in the frame.MB1
Oct 28, 2001 7:45 AM
The mind boggles with the possabilities.
Vulcan technology?Jon
Oct 28, 2001 8:08 AM
This thing looks like something off the holodeck of the Enterprise. Until I see
a pro team riding one I wouldn't take it too seriously. The price is pretty egregious too.
Now I can take my goldfish along for a ride (nm)Starliner
Oct 28, 2001 5:36 PM
re: They're Serious...Cliff Oates
Oct 28, 2001 9:08 AM
All is fair in time trials and triathlons. The bike would look better if they used opaque mylar -- I'm not into visible bridgework. I looked at a regular Vulcan when the sales rep was visiting my LBS. Nice bike, actually. I have absolutely no use for one, but if I were TTing or doing triathlons and could dedicate a bike to the task, they'd be on the short list.