frame materials

Does the frame material have anything to do with performance? Trek's
advertisement for one of their road bikes says that the carbon fork
soaks up vibration. Exactly how does it do that? As far as I can see
the material the fork is made of can have no influence on vibration.
The fork/handlebar assembly is for all practical purposes a solid
unit. Road shock and vibration is transmitted directly from the wheel
to the handlebar. Same should apply to the rear triangle, a rigid
structure that cannot "soak up" vibration. Basically the only factor
effecting vibration is tire pressure. A bicycle frame is a very
simple structure comprised of two triangles. It, for all practical
purposes hasn't changed in 100 years except for the availability of
better materials that allow lighter frames to be built and more
sophisticated manufacturing methods. I doubt that there is any
difference in performance between frames made of various materials.

Dick Ryan

Dick Ryan aka The Godfather wrote:

Does the frame material have anything to do with performance? Trek's
advertisement for one of their road bikes says that the carbon fork
soaks up vibration. Exactly how does it do that? As far as I can see
the material the fork is made of can have no influence on vibration.
The fork/handlebar assembly is for all practical purposes a solid
unit. Road shock and vibration is transmitted directly from the wheel
to the handlebar. Same should apply to the rear triangle, a rigid
structure that cannot "soak up" vibration. Basically the only factor
effecting vibration is tire pressure. A bicycle frame is a very
simple structure comprised of two triangles.

Even bicycles like this:
http://ryanownersclub.com/scrapbook/vanguard/titaniumvanguard.jpg?
Seems to violate several of the above contentions, does it not?

It, for all practical
purposes hasn't changed in 100 years except for the availability of
better materials that allow lighter frames to be built and more
sophisticated manufacturing methods. I doubt that there is any
difference in performance between frames made of various materials.

What about the concept of rotating the rider's body position backwards
by 90° or so?

--
Tom Sherman - Holstein-Friesland Bovinia
The weather is here, wish you were beautiful

--
Posted via a free Usenet account from http://www.teranews.com

In article ,
Johnny Sunset aka Tom Sherman writes:

It, for all practical
purposes hasn't changed in 100 years except for the availability of
better materials that allow lighter frames to be built and more
sophisticated manufacturing methods. I doubt that there is any
difference in performance between frames made of various materials.

What about the concept of rotating the rider's body position backwards
by 90° or so?

Yeah, wheelies are fun too :-) :-)


cheers,
Tom

--
Nothing is safe from me.
I'm really at:
tkeats curlicue vcn dot bc dot ca

Does the frame material have anything to do with performance? Trek's
advertisement for one of their road bikes says that the carbon fork
soaks up vibration. Exactly how does it do that? I doubt that there is any
difference in performance between frames made of various materials.

Material hardness, stiffness, and resonance.

The simplest test is to ride two Specialized Sirrus bikes of identical
size. The lower model has a cromoloy fork and rear triangle. The upper
model has carbon fork and triangle.

Another test is to try two different seatposts on the same bike with a
rock-hard seat. One carbon, one aluminum.

Or - have you ever seen a tuning fork made from carbon? It wouldn't
sound very clear, if at all.

If you alter your idea of vibration to include higher frequencies,
those are soaked up quite differently from material to material.

On Jul 14, 9:59 pm, bryanska wrote:
Does the frame material have anything to do with performance? Trek's
advertisement for one of their road bikes says that the carbon fork
soaks up vibration. Exactly how does it do that? I doubt that there is any
difference in performance between frames made of various materials.

Material hardness, stiffness, and resonance.

The simplest test is to ride two Specialized Sirrus bikes of identical
size. The lower model has a cromoloy fork and rear triangle. The upper
model has carbon fork and triangle.

Another test is to try two different seatposts on the same bike with a
rock-hard seat. One carbon, one aluminum.

Or - have you ever seen a tuning fork made from carbon? It wouldn't
sound very clear, if at all.

If you alter your idea of vibration to include higher frequencies,
those are soaked up quite differently from material to material.

If you are saying the a CFRP frame *sounds* different than a steel or
aluminum frame, you are exactly correct.

Not a bicycle. So not relevent. Bonk

Kurd (who?) anonymously snipes:
Not a bicycle. So not relevent. Bonk

First point of order is context, or in this case the lack thereof.

Second point of order; if it has two wheels in a single track and is
pedal powered, it is a bicycle.

Third point of order; it is spelled "relevant".

Fourth point of order; if you are bonking [1], you need to change your
food intake habits.

[1] US, not UK, usage.

--
Tom Sherman - Holstein-Friesland Bovinia
The weather is here, wish you were beautiful

--
Posted via a free Usenet account from http://www.teranews.com

"Johnny Sunset aka Tom Sherman" wrote in message
.. .
Kurd (who?) anonymously snipes:
Not a bicycle. So not relevent. Bonk

First point of order is context, or in this case the lack thereof.

Second point of order; if it has two wheels in a single track and is pedal
powered, it is a bicycle.

Third point of order; it is spelled "relevant".

Fourth point of order; if you are bonking [1], you need to change your
food intake habits.

[1] US, not UK, usage.

Mr. Tom Sherman of ARBR is almost as good as dealing with idiots as I am.
But RBM just has too many for any one individual to deal with. Only the
Great Brickston knows how to deal with them on their own terms. We here on
ARBR are just too intellectual for the idiots of RBM.

Regards,

Ed Dolan the Great - Minnesota
aka
Saint Edward the Great - Order of the Perpetual Sorrows - Minnesota

Not a bike, nor have they been bikes since 1933.

Best thing the UCI ever did.

Kurd (who?) anonymously wrote:

Dude, ever hear of context?

Not a bike, nor have they [recumbents] been bikes since 1933.

INDEFINITE PRONOUN ALERT!

I believe "Kurd" means April 1, 1933.

Best thing the UCI ever did.

The UCI only defines what a bicycle is for the purposes of the
professional racing series they sanction. The UCI is not the arbiter of
language in any country. Duh!

--
Tom Sherman - Holstein-Friesland Bovinia
The weather is here, wish you were beautiful

--
Posted via a free Usenet account from http://www.teranews.com