T
Tim McNamara
Guest
In article <[email protected]>,
RonSonic <[email protected]> wrote:
> I am just astonished at this rigorous adherence to dogma. Listen and
> feel. Use your freeking senses. Your lack of a theory to explain it
> does NOT invalidate observation.
Problem is, Ron, that this has been discussed for like 100 years. The
double-diamond bicycle frame is a vertically rigid structure
geometrically, and frame material has little if anything to do with the
road vibrations you feel while riding. The possible exception to this,
as far as I can tell, is composites such as carbon fiber and wood,
because those have a very different structure than metals and thus might
conceivably transmit high frequency vibrations differently. Whether
that would be sufficient to make a measurable difference in the useful
range, I don't know.
The comfort issue in road bicycles is high amplitude low frequency
vibration, such as from cobblestones, coarse chip seal and pavement
seams. Low amplitude high frequency vibration- the kind most likely to
be damped by a frame material- is not important in terms of comfort.
It's just a buzzy feeling in the bars and saddle.
Your subjective impressions are not data ("data" not being the plural of
"anecdote"). There is no lack of a theory to explain- the theory is
that your subjective impressions are in error. There are so many
confounds that would have to be eliminated in order to prove your
observations accurate. Some of those confounds are psychological
(expectation, bias, etc) and some are mechanical.
RonSonic <[email protected]> wrote:
> I am just astonished at this rigorous adherence to dogma. Listen and
> feel. Use your freeking senses. Your lack of a theory to explain it
> does NOT invalidate observation.
Problem is, Ron, that this has been discussed for like 100 years. The
double-diamond bicycle frame is a vertically rigid structure
geometrically, and frame material has little if anything to do with the
road vibrations you feel while riding. The possible exception to this,
as far as I can tell, is composites such as carbon fiber and wood,
because those have a very different structure than metals and thus might
conceivably transmit high frequency vibrations differently. Whether
that would be sufficient to make a measurable difference in the useful
range, I don't know.
The comfort issue in road bicycles is high amplitude low frequency
vibration, such as from cobblestones, coarse chip seal and pavement
seams. Low amplitude high frequency vibration- the kind most likely to
be damped by a frame material- is not important in terms of comfort.
It's just a buzzy feeling in the bars and saddle.
Your subjective impressions are not data ("data" not being the plural of
"anecdote"). There is no lack of a theory to explain- the theory is
that your subjective impressions are in error. There are so many
confounds that would have to be eliminated in order to prove your
observations accurate. Some of those confounds are psychological
(expectation, bias, etc) and some are mechanical.