Fluted seatpost

So [email hidden] (Rik O'Shea) says:

Quoted message said:

I've just "rediscovered" my old Rossin track bike packaged
in the back of the shed. The seatpost has elongated
indentations. Can anyone suggest what the rationale is
behind this design or is it just asthetics ?

Weight?

jeffb

On 23 Mar 2004 06:38:29 -0800, [email hidden] (Rik O'Shea) may

have said:

I've just "rediscovered" my old Rossin track bike packaged
in the back of the shed. The seatpost has elongated
indentations. Can anyone suggest what the rationale is
behind this design or is it just asthetics ?

In reality, it's purely for appearance. There have been
people who believed fluting could make a lighter post, but
the actual implementations often had the reverse effect.

--
My email address is antispammed; pull WEEDS if replying via e-mail.
Typoes are not a bug, they're a feature.
Words processed in a facility that contains nuts.

[email hidden] (Rik O'Shea) wrote in message news:<[email hidden]>...

Quoted message said:

I've just "rediscovered" my old Rossin track bike packaged
in the back of the shed. The seatpost has elongated
indentations. Can anyone suggest what the rationale is
behind this design or is it just asthetics ?

Dear Rik,

See this explanation of the fuller in a sword blade, often
mistakenly called the blood gutter:

people.howstuffworks.comsword making1.htmOpen ↗

Any reduction in weight through fluting the side of a seat
post is unlikely to matter, but there might be a similar
effect in mind.

You could try removing your seat post and see whether its
flutes give you any advantage when fencing with someone
armed with a non-fluted seat post.

Carl Fogel

Rik O'Shea said:

I've just "rediscovered" my old Rossin track bike packaged
in the back of the shed. The seatpost has elongated
indentations. Can anyone suggest what the rationale is
behind this design or is it just asthetics ?

Yep, purtie.

BTW, a friend needs a Campy Super Record fluted seat post
(with the two screws) in 26.8. Anyone know of a source?

"David L. Johnson" <[email hidden]> wrote in message news:<[email hidden]>...

Quoted message said:

Rik O'Shea said:

I've just "rediscovered" my old Rossin track bike
packaged in the back of the shed. The seatpost has
elongated indentations. Can anyone suggest what the
rationale is behind this design or is it just
asthetics ?

snip

Quoted message said:

There were people back then who actually drilled holes in
their brake arches. Since I have not met, recently, anyone
who would admit to having done so, I can only imagine that
natural selection has taken care of them.

Guy came into my shop one day the the stantion (sp) tubes of
his Manitou fork all drilled out ... plus his seat post,
shifter pods, brake levers and his cranks.

When asked why he did it his response was that all
that material was left in to make the manufacturing
less expensive.. he knew that because he was an
engeneering student.

Quoted post said:

Originally posted by Clyde

BRik O'Shea said:

I've just "rediscovered" my old Rossin track bike packaged
in the back of the shed. The seatpost has elongated
indentations. Can anyone suggest what the rationale is
behind this design or is it just asthetics ?

Yep, purtie.

BTW, a friend needs a Campy Super Record fluted seat post
(with the two screws) in 26.8. Anyone know of a source? [/B]

Dear Clyde,

Possibly what they're calling a "seatpin" here:

http://www.ashton45.freeserve.co.uk/ns-partsandaccessory.htm

Good luck,

J-P. Rampal

carlfogel said:

Quoted message said:

BTW, a friend needs a Campy Super Record fluted seat
post (with the two
screws) in 26.8. Anyone know of a source?

Quoted message said:

Dear Clyde, Possibly what they're calling a "seatpin"
here: ashton45.freeserve.co.uknsOpen ↗
partsandaccessory.htm Good luck,J-P. Rampal

Oh so close but no joy. They only have the newer one-bolt
style in 26.8 and the older 2-bolt in other sizes. He's
restoring a Teledyne to original and this is the last
obscure part to hunt down. Thanks anyhow!

Do Brits really call a seatpost a seatpin?

Rik O'Shea said:

I've just "rediscovered" my old Rossin track bike packaged
in the back of the shed. The seatpost has elongated
indentations. Can anyone suggest what the rationale is
behind this design or is it just asthetics?

Weight-obsessed riders milled flutes in any part that
couldn't reasonably be drilled. Campagnolo reflected the
craze for custom drilling and milling in the styling of
their Super Record brake levers and seatposts, that were in
turn copied by every other manufacturer.

bulgier.netAsLightAsOpen ↗
Air_1.jpg bulgier.netMagazineArticlesOpen ↗

James Thomson

On 23 Mar 2004 11:48:06 -0800, [email hidden] (Carl Fogel) may

have said:

You could try removing your seat post and see whether its
flutes give you any advantage when fencing with someone
armed with a non-fluted seat post.

When fencing, I prefer a pressure-treated 4x4 set in
concrete.

--
My email address is antispammed; pull WEEDS if replying via e-mail.
Typoes are not a bug, they're a feature.
Words processed in a facility that contains nuts.

Clyde said:

Do Brits really call a seatpost a seatpin?

Some do. Some even call it a saddle stem. Funny thing,
language.

James Thomson

Makes sense to me..
after the countless hours spent making a manitou suspension fork, the
intense labour of drilling a few holes in it would have tripled production
cost. :0

Mike mikebeauchamp.commikebeauchamp.comOpen ↗

"ajames54" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

"David L. Johnson" <[email hidden]> wrote
in message

news:<[email hidden]>...

Quoted message said:

Quoted message said:

Rik O'Shea said:

I've just "rediscovered" my old Rossin track bike
packaged in the back of the shed. The seatpost has
elongated indentations. Can anyone suggest what the
rationale is behind this design or is it just
asthetics ?

snip

Quoted message said:

There were people back then who actually drilled holes
in their brake arches. Since I have not met, recently,
anyone who would admit to

having

Quoted message said:

Quoted message said:

done so, I can only imagine that natural selection has
taken care of

them.

Quoted message said:

Guy came into my shop one day the the stantion (sp) tubes
of his Manitou fork all drilled out ... plus his seat
post, shifter pods, brake levers and his cranks.

When asked why he did it his response was that all that
material was left in to make the manufacturing less
expensive.. he knew that because he was an engeneering
student.

Quoted post said:

Originally posted by Werehatrack
On 23 Mar 2004 11:48:06 -0800, [email hidden] (Carl Fogel) may

have said:

You could try removing your seat post and see whether its
flutes give you any advantage when fencing with someone
armed with a non-fluted seat post.

When fencing, I prefer a pressure-treated 4x4 set in
concrete.

--
My email address is antispammed; pull WEEDS if replying via e-mail.
Typoes are not a bug, they're a feature.
Words processed in a facility that contains nuts.

Dear Werehatrack,

Touché!

Carl Fogel

The purpose of the fluted seatpost was to funnel water into
the seat tube, where it worked to seize the post tightly to
the frame, thereby eliminating any possibility of slippage.

Quoted message said:

Rik O'Shea said:

I've just "rediscovered" my old Rossin track bike packaged
in the back of the shed. The seatpost has elongated
indentations. Can anyone suggest what the rationale is
behind this design or is it just asthetics ?

David L. Johnson said:

Fluted seatposts were pretty common back in the drillium
days, when people shaved off as much material from their
components as they could. Recognizing the complete
stupidity of drilling holes in a seatpost, they cut
grooves in them instead. The only real effect was to
better let water inside the frame. Not much weight
savings. There were people back then who actually
drilled holes in their brake arches. Since I have not
met, recently, anyone who would admit to having done so,
I can only imagine that natural selection has taken care
of them.

Campagnolo's #4051/1 seatpost of the era was fluted already.

We cut R and pentagon logos in the top of the seatpost for
the Rossin importer at the time and filled the pantograph
cuts with red, white and green paint. The long grooves were
Campagnolo's. Their flutes didn't go past the limit line and
so didn't allow water into the frame.

Drilling was indeed taken to extremes. Italvega sunk a
series of 12mm holes in their Record crank arms. Renzetti
cut away so much of the 1014.1 levers you could fold one
over in your fingers

--
Andrew Muzi www.yellowjersey.org Open every day since 1
April, 1971

R15757 said:

The purpose of the fluted seatpost was to funnel water
into the seat tube, where it worked to seize the post
tightly to the frame, thereby eliminating any possibility
of slippage.

Holy [censored]. As I was instructed, that was to have a good
resonating chamber. Working like an upright recorder, with
mouthpiece at the saddle.

Sergio Pisa

Clyde said:

Yep, purtie.

BTW, a friend needs a Campy Super Record fluted seat post
(with the two screws) in 26.8. Anyone know of a source?

That would be a "Record" post (#1044), then. The Super
Record (#4051/1) was a single-bolt design. But the Record
post is not fluted, so he'd have to get a machinist to mill
some flutes if that's what he really wants.

--

-John ([email hidden])

John Thompson said:

Quoted message said:

BTW, a friend needs a Campy Super Record fluted seat
post (with the two screws) in 26.8. Anyone know of a
source?

That would be a "Record" post (#1044), then. The Super
Record (#4051/1) was a single-bolt design. But the Record
post is not fluted, so he'd have to get a machinist to
mill some flutes if that's what he really wants.

Nope, a 2-bolt fluted SR preceded the 1-bolt. It's quite
rare in 26.8 but did exist.

John Thompson said:

That would be a "Record" post (#1044), then. The Super
Record (#4051/1) was a single-bolt design.

The first Super Record post, the 4051, was a fluted, two-
bolt design. See:

campyonly.comsuper record.pdfOpen ↗

(That's a 3.2MB pdf download)

James Thomson

[email hidden] (Clyde) wrote in message news:<[email hidden]>...

Quoted message said:

carlfogel said:

Quoted message said:

BTW, a friend needs a Campy Super Record fluted seat
post (with the two
screws) in 26.8. Anyone know of a source?

Quoted message said:

Dear Clyde, Possibly what they're calling a "seatpin"
here: ashton45.freeserve.co.uknsOpen ↗
partsandaccessory.htm Good luck,J-P. Rampal

Oh so close but no joy. They only have the newer one-bolt
style in 26.8 and the older 2-bolt in other sizes. He's
restoring a Teledyne to original and this is the last
obscure part to hunt down. Thanks anyhow!

Do Brits really call a seatpost a seatpin?

Dear Clyde,

Maybe these guys for a 26.8 Campagnolo Super Record two-bolt
thing-that-the-seat-sits-on?

Campagnolo Seatposts Supply is generally limited on these.
We usually have some NOS one-bolt Super Record posts, as
well as some 2-bolt vintage Record posts in 26.8, 27.0,
and 27.2 sizes.

bicycleclassics.comsaddles.htmlOpen ↗

The "usually" means that I wish you good luck.

Carl Fogel