Pop up seatpost

Other things you can do: get off the saddle when you stop keep both feet on the pedals and balance
ride around in circles - but I don't think this is a good thing to do, as other drivers watch you
and are not certain that you might enter the intersection at random based on their memories of
little kids behavoir on bikes get a bike with different configuration. for example my road bike has
a lower bottom bracket, about 10.3", and I can more easily reach the ground with my toe while
seated. Or for a more extreme choice try a recumbent or a cruiser with a very slack seat angle.

Bruce

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

Quoted message said:

Hello, I used to ride a bit mostly around town, Continental style bicycle. One thing which always
bugged me was seatpost height, I thought the idea that a rider develops more power more
comfortably with a high saddle which extends the leg closer to fully straight was entirely
correct. But

numerous

Quoted message said:

stops for stop lights and signs are an obligation of the more responsible rider on the public
streets, and then a high saddle is extremely uncomfortable because the leg upon which one leans
must be held fully extended, and the foot as well must be held straight, that gets real
uncomfortable quick, leaning at an extreme angle gives me bad cramps.

Dale Benjamin said:

It would be VERY nice to be able to adjust the seat height in very small increments so as to
relieve strain on long rides, but even a two position with a couple inches between high and low
seems like a valuable gain to me.

Dale ( Always inventing bike ) Benjamin [email hidden]

Don't worry it's been done already. gravitydropper.comgravitydropper.comOpen ↗
hurrycat.frproduitgc.htmlOpen ↗

BTW a nice trackstand will also solve this problem for you.

--
Perre

You have to be smarter than a robot to reply.

Dale Benjamin said:

So in order to have a comfortable saddle height for possibly prolonged stops in traffic and another
height for comfortable riding when one doesn't put a foot on the ground for a half hour at a time,
why not develop a pop up seatpost?

Because it's enormously simpler just to get off the saddle and straddle the crossbar?
--
David Damerell <[email hidden]> flcl?

Quoted message said:

So in order to have a comfortable saddle height for possibly prolonged

stops

Quoted message said:

in traffic and another height for comfortable riding when one doesn't put

a

Quoted message said:

foot on the ground for a half hour at a time, why not develop a pop up seatpost? Modify a
conventional one by putting a second tube within it,

and

titec.comitems.aspOpen ↗

--
Phil, Squid-in-Training

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

Quoted message said:

Hello, I used to ride a bit mostly around town, Continental style bicycle. One thing which always
bugged me was seatpost height, I thought the idea that a rider develops more power more
comfortably with a high saddle which extends the leg closer to fully straight was entirely
correct. But numerous stops for stop lights and signs are an obligation of the more responsible
rider on the public streets, and then a high saddle is extremely uncomfortable because the leg
upon which one leans must be held fully extended, and the foot as well must be held straight, that
gets real uncomfortable quick, leaning at an extreme angle gives me bad cramps.

So in order to have a comfortable saddle height for possibly prolonged stops in traffic and
another height for comfortable riding when one doesn't put a foot on the ground for a half hour at
a time, why not develop a pop up seatpost? Modify a conventional one by putting a second tube
within it, and a mechanism to operate a catch within the second tube ( or mostly solid rod,
probably ) so the catch can be retracted ( something like a bar end or thumb shifter to operate it
) which lets the second tube move up ( under spring pressure ), or down ( under rider weight ).
The catch would be spring loaded too. Maybe we can fill the old tube along the sides with primo
epoxy and shape the tube to fit, got to maintain the seat alignment with the frame. Maybe it would
be expeditious to fabricate both tubes/rods.

I don't have a metal shop in the basement, or even a basement, so I'm not keeping the idea to
myself in some vain hope of cashing in. There are probably dozens of ways to implement the notion
and some turkeys have a lot more experience and knowhow than I, it's probably been done or tried
before but I'm not aware of it.

Again, the basic idea is that one starts off with the seat in the low position, and if no stops
are imminent, raises up on the seat, pushes the thumb lever, and the seat, under spring pressure,
rises. When the saddle is high enough, one releases the thumb lever, and the seatpost latches into
position.

Then, when a stop is imminent, one again rises off the seat, pushes the lever, and the seat comes
free, put some weight on it and it lowers, when it's low enough release the lever and it latches,
this time in a lower position.

It would be VERY nice to be able to adjust the seat height in very small increments so as to
relieve strain on long rides, but even a two position with a couple inches between high and low
seems like a valuable gain to me.

Dale ( Always inventing bike ) Benjamin [email hidden]

Sounds like you need the "Hite Rite" seatpost attachment that was all the rage in the early days of
mountain biking.

On Tue, 13 Jan 2004 02:58:54 -0800, "Dale Benjamin"

may have said:

So in order to have a comfortable saddle height for possibly prolonged stops in traffic and another
height for comfortable riding when one doesn't put a foot on the ground for a half hour at a time,
why not develop a pop up seatpost?

Assuming there's a good reason not to want to simply hop down and straddle the frame instead of
staying on the saddle (which, in traffic, I admit, is not always practical), there's already a
mechanism in existence that would probably fit the bill, and could likely be adapted to bikes with
little re-engineering. The adjustable-height pressurized cylinder system from an office task chair
does pretty much what you're looking for. Some of them have an OD of about an inch on the cylinder
itself. I haven't closely examined the latching mechanism, but perhaps an interested person might
take the time to see if there's an opportunity here.

--
My email address is antispammed; pull WEEDS if replying via e-mail.
Yes, I have a killfile. If I don't respond to something,
it's also possible that I'm busy.
Words processed in a facility that contains nuts.

Dale Benjamin said:

a high saddle is extremely uncomfortable because the leg upon which one leans must be held fully
extended, and the foot as well must be held straight, that gets real uncomfortable quick, leaning
at an extreme angle gives me bad cramps.

There are some new bike designs this year, to address this very problem. They're lower to the
ground, with a slack seat angle, so you can put both feet on the ground while still in the
saddle. Of course they're a compromise, but a good one for some riders. IIRC, Giant and Electra
make these bikes.

Quoted message said:

So in order to have a comfortable saddle height for possibly prolonged stops in traffic and
another height for comfortable riding when one doesn't put a foot on the ground for a half hour at
a time, why not develop a pop up seatpost? Modify a conventional one by putting a second tube
within it, and a mechanism to operate a catch within the second tube ( or mostly solid rod,
probably ) so the catch can be retracted ( something like a bar end or thumb shifter to operate it
) which lets the second tube move up ( under spring pressure ), or down ( under rider weight ).
The catch would be spring loaded too. Maybe we can fill the old tube along the sides with primo
epoxy and shape the tube to fit, got to maintain the seat alignment with the frame. Maybe it would
be expeditious to fabricate both tubes/rods.

Find an old Hite-Rite, which were popular in the 80s for MTBs. Loosen the quick release while
sitting on the saddle, and it drops 2". Unweight the saddle, and it pops right up again.

Matt O.

Werehatrack said:

mechanism in existence that would probably fit the bill, and could likely be adapted to bikes with
little re-engineering. The adjustable-height pressurized cylinder system from an office task chair
does pretty much what you're looking for. Some of them have an OD of about an inch on the cylinder
itself. I haven't closely

This would also double as a suspension seatpost, if not modified to lock in place. Cool.

Quoted message said:

examined the latching mechanism, but perhaps an interested person might take the time to see if
there's an opportunity here.

The gears are turning in my head, and it hurts. Stop the gears! Arrgh!
--
Rick Onanian

Dale Benjamin said:

Hello, I used to ride a bit mostly around town, Continental style bicycle. One thing which always
bugged me was seatpost height, I thought the idea that a rider develops more power more
comfortably with a high saddle which extends the leg closer to fully straight was entirely
correct. But numerous stops for stop lights and signs are an obligation of the more responsible
rider on the public streets, and then a high saddle is extremely uncomfortable because the leg
upon which one leans must be held fully extended, and the foot as well must be held straight, that
gets real uncomfortable quick, leaning at an extreme angle gives me bad cramps.

So in order to have a comfortable saddle height for possibly prolonged stops in traffic and
another height for comfortable riding when one doesn't put a foot on the ground for a half hour at
a time, why not develop a pop up seatpost? Modify a conventional one by putting a second tube
within it, and a mechanism to operate a catch within the second tube ( or mostly solid rod,
probably ) so the catch can be retracted ( something like a bar end or thumb shifter to operate it
) which lets the second tube move up ( under spring pressure ), or down ( under rider weight ).
The catch would be spring loaded too. Maybe we can fill the old tube along the sides with primo
epoxy and shape the tube to fit, got to maintain the seat alignment with the frame. Maybe it would
be expeditious to fabricate both tubes/rods.

I don't have a metal shop in the basement, or even a basement, so I'm not keeping the idea to
myself in some vain hope of cashing in. There are probably dozens of ways to implement the notion
and some turkeys have a lot more experience and knowhow than I, it's probably been done or tried
before but I'm not aware of it.

Again, the basic idea is that one starts off with the seat in the low position, and if no stops
are imminent, raises up on the seat, pushes the thumb lever, and the seat, under spring pressure,
rises. When the saddle is high enough, one releases the thumb lever, and the seatpost latches into
position.

Then, when a stop is imminent, one again rises off the seat, pushes the lever, and the seat comes
free, put some weight on it and it lowers, when it's low enough release the lever and it latches,
this time in a lower position.

It would be VERY nice to be able to adjust the seat height in very small increments so as to
relieve strain on long rides, but even a two position with a couple inches between high and low
seems like a valuable gain to me.

The Breeze/Angell Hite Rite system (1986?) does that. Used with a normal seatpost an seat Q/R, One
pulls teh Q/R for teh low position, the seta sinking with rider weight. To return to the high
position, undo the Q/R and unweigh the seat. Once it pops up to the tall position, just lock teh
Q/R again. All stainless. We gave them .

Designers of the era like Angel Rodriguez built frames with seatlug castings incorporating the
HiteRite mounts and a forward-facing slit and seatpost binder ears so teh Q/R woudl be mor
easily reached.

Is this ancient history already?

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

Dale Benjamin said:

Hello, I used to ride a bit mostly around town, Continental style bicycle. One thing which always
bugged me was seatpost height, I thought the idea that a rider develops more power more
comfortably with a high saddle which extends the leg closer to fully straight was entirely
correct. But numerous stops for stop lights and signs are an obligation of the more responsible
rider on the public streets, and then a high saddle is extremely uncomfortable because the leg
upon which one leans must be held fully extended, and the foot as well must be held straight, that
gets real uncomfortable quick, leaning at an extreme angle gives me bad cramps.

So in order to have a comfortable saddle height for possibly prolonged stops in traffic and
another height for comfortable riding when one doesn't put a foot on the ground for a half hour at
a time, why not develop a pop up seatpost? Modify a conventional one by putting a second tube
within it, and a mechanism to operate a catch within the second tube ( or mostly solid rod,
probably ) so the catch can be retracted ( something like a bar end or thumb shifter to operate it
) which lets the second tube move up ( under spring pressure ), or down ( under rider weight ).
The catch would be spring loaded too. Maybe we can fill the old tube along the sides with primo
epoxy and shape the tube to fit, got to maintain the seat alignment with the frame. Maybe it would
be expeditious to fabricate both tubes/rods.

I don't have a metal shop in the basement, or even a basement, so I'm not keeping the idea to
myself in some vain hope of cashing in. There are probably dozens of ways to implement the notion
and some turkeys have a lot more experience and knowhow than I, it's probably been done or tried
before but I'm not aware of it.

Again, the basic idea is that one starts off with the seat in the low position, and if no stops
are imminent, raises up on the seat, pushes the thumb lever, and the seat, under spring pressure,
rises. When the saddle is high enough, one releases the thumb lever, and the seatpost latches into
position.

Then, when a stop is imminent, one again rises off the seat, pushes the lever, and the seat comes
free, put some weight on it and it lowers, when it's low enough release the lever and it latches,
this time in a lower position.

It would be VERY nice to be able to adjust the seat height in very small increments so as to
relieve strain on long rides, but even a two position with a couple inches between high and low
seems like a valuable gain to me.

Personally I can just get a toe down, although the wind from articulated lorries almost blows me
over in this precarious condition. The easiest thing is to do a trackstand, anticipate the lights,
or (my favourite) grab hold of a convenient lamppost or pedestrian barrier.

On Tue, 13 Jan 2004 21:34:37 +0000, Zog The Undeniable <[email hidden]>

may have said:

Personally I can just get a toe down, although the wind from articulated lorries almost blows me
over in this precarious condition. The easiest thing is to do a trackstand, anticipate the lights,
or (my favourite) grab hold of a convenient lamppost or pedestrian barrier.

But not the folds of the sunroof of the 2CV that's been waiting for the roundabout to clear
since August...

--
My email address is antispammed; pull WEEDS if replying via e-mail.
Yes, I have a killfile. If I don't respond to something,
it's also possible that I'm busy.
Words processed in a facility that contains nuts.

On Tue, 13 Jan 2004 15:12:04 -0600, A Muzi <[email hidden]>

Quoted message said:

Dale Benjamin wrote:

<snip>

Quoted message said:

Quoted message said:

It would be VERY nice to be able to adjust the seat height in very small increments so as to
relieve strain on long rides, but even a two position with a couple inches between high and low
seems like a valuable gain to me.

The Breeze/Angell Hite Rite system (1986?) does that. Used with a normal seatpost an seat Q/R, One
pulls teh Q/R for teh low position, the seta sinking with rider weight. To return to the high
position, undo the Q/R and unweigh the seat. Once it pops up to the tall position, just lock teh
Q/R again. All stainless. We gave them .

Designers of the era like Angel Rodriguez built frames with seatlug castings incorporating the
HiteRite mounts and a forward-facing slit and seatpost binder ears so teh Q/R woudl be mor
easily reached.

Is this ancient history already?

Not to me - and I'm a young'un. Last year, on a lark, I picked up a NOS Hite Rite for the mountain
bike I had just pieced together. I wasn't expecting much of it but I find that it works quite well;
with a bit of practice, adjusting it while riding becomes a practical affair.

The gravitydropper unit might fill the bill, I don't know. Too much money, $250, jeeesch. And 14"
long, I wonder what would be the minimum height over the frame seat tube. How do they prevent the
inner tube from rotating within the outer, or is that up to the rider? I reckon CNC alloy is primo,
but wonder about the longevity, how many usage cycles to expect?

Thanks for the reply. I couldn't conjure up enough French to make heads or tails of the second URL.

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

Quoted message said:

Dale Benjamin said:

It would be VERY nice to be able to adjust the seat height in very small increments so as to
relieve strain on long rides, but even a two position with a couple inches between high and low
seems like a valuable gain to me.

Dale ( Always inventing bike ) Benjamin [email hidden]

Don't worry it's been done already. gravitydropper.comgravitydropper.comOpen ↗
hurrycat.frproduitgc.htmlOpen ↗

BTW a nice trackstand will also solve this problem for you.

--
Perre

You have to be smarter than a robot to reply.

Hi,

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

Quoted message said:

Other things you can do: get off the saddle when you stop

Still have to get back up, not the easiest thing with a very high seat. Staying on the saddle is
supposed to reduce traffic delays.

Quoted message said:

keep both feet on the pedals and balance

I'm not very acrobatic.

Quoted message said:

ride around in circles - but I don't think this is a good thing to do, as other drivers watch
you and are not certain that you might enter the intersection at random based on their
memories of little kids behavoir on bikes

Right. Unpredictable behavior in traffic is seldom appreciated.

Quoted message said:

get a bike with different configuration. for example my road bike has

a

Quoted message said:

lower bottom bracket, about 10.3", and I can more easily reach the ground with my toe while
seated. Or for a more extreme choice try a recumbent or

a

Quoted message said:

cruiser with a very slack seat angle.

Recumbents look kind of scary to me, on the streets in traffic they're so low and easily overlooked.
I would expect a cruiser with enough distance between the seat and pedals to allow full extension of
the leg and foot similar to walking or running would be rather long and unwieldy, then I'd have to
improvise gearing for it. My present hybrid Novara has geometry similar to expensive Bianchi road
machines, but heavier tubing which I think is a plus, being over 220 pounds.

Quoted message said:

Bruce

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

Quoted message said:

Hello, I used to ride a bit mostly around town, Continental style

bicycle.

Quoted message said:

Quoted message said:

One thing which always bugged me was seatpost height, I thought the idea that a rider develops
more power more comfortably with a high saddle

which

Quoted message said:

Quoted message said:

extends the leg closer to fully straight was entirely correct. But

numerous

Quoted message said:

stops for stop lights and signs are an obligation of the more

responsible

Quoted message said:

Quoted message said:

rider on the public streets, and then a high saddle is extremely uncomfortable because the leg
upon which one leans must be held fully extended, and the foot as well must be held straight,
that gets real uncomfortable quick, leaning at an extreme angle gives me bad cramps.

Interesting, but how is it operated? I already have my hands full shifting the chainring and the
cassette to low when approaching a stop, reaching under the seat to fiddle with a cam type QR is out
of the question. Is the seat's alignment with the frame maintained throughout the change?

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

Quoted message said:

Quoted message said:

So in order to have a comfortable saddle height for possibly prolonged

stops

Quoted message said:

in traffic and another height for comfortable riding when one doesn't

put

Quoted message said:

a

Quoted message said:

foot on the ground for a half hour at a time, why not develop a pop up seatpost? Modify a
conventional one by putting a second tube within it,

and

titec.comitems.aspOpen ↗

--
Phil, Squid-in-Training

Reaching down under the seat and working a cam type QR as I approach each of fifty stops in an
hour's ride isn't going to work. And I doubt the QR will last through many hundred cycles.

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

Quoted message said:

"Dale Benjamin" <[email hidden]> wrote in message

news:<[email hidden]>...

Quoted message said:

Quoted message said:

Hello, I used to ride a bit mostly around town, Continental style

bicycle.

Quoted message said:

Quoted message said:

One thing which always bugged me was seatpost height, I thought the idea that a rider develops
more power more comfortably with a high saddle

which

Quoted message said:

Quoted message said:

extends the leg closer to fully straight was entirely correct. But

numerous

Quoted message said:

Quoted message said:

stops for stop lights and signs are an obligation of the more

responsible

Quoted message said:

Quoted message said:

rider on the public streets, and then a high saddle is extremely uncomfortable because the leg
upon which one leans must be held fully extended, and the foot as well must be held straight,
that gets real uncomfortable quick, leaning at an extreme angle gives me bad cramps.

So in order to have a comfortable saddle height for possibly prolonged

stops

Quoted message said:

Quoted message said:

in traffic and another height for comfortable riding when one doesn't

put a

Quoted message said:

Quoted message said:

foot on the ground for a half hour at a time, why not develop a pop up seatpost? Modify a
conventional one by putting a second tube within it,

and

Quoted message said:

Quoted message said:

a mechanism to operate a catch within the second tube ( or mostly solid

rod,

Quoted message said:

Quoted message said:

probably ) so the catch can be retracted ( something like a bar end or thumb shifter to operate
it ) which lets the second tube move up ( under spring pressure ), or down ( under rider weight
). The catch would be spring loaded too. Maybe we can fill the old tube along the sides with
primo epoxy and shape the tube to fit, got to maintain the seat

alignment

Quoted message said:

Quoted message said:

with the frame. Maybe it would be expeditious to fabricate both

tubes/rods.

Quoted message said:

Quoted message said:

I don't have a metal shop in the basement, or even a basement, so I'm

not

Quoted message said:

Quoted message said:

keeping the idea to myself in some vain hope of cashing in. There are probably dozens of ways to
implement the notion and some turkeys have a

lot

Quoted message said:

Quoted message said:

more experience and knowhow than I, it's probably been done or tried

before

Quoted message said:

Quoted message said:

but I'm not aware of it.

Again, the basic idea is that one starts off with the seat in the low position, and if no stops
are imminent, raises up on the seat, pushes

the

Quoted message said:

Quoted message said:

thumb lever, and the seat, under spring pressure, rises. When the

saddle is

Quoted message said:

Quoted message said:

high enough, one releases the thumb lever, and the seatpost latches into position.

Then, when a stop is imminent, one again rises off the seat, pushes the lever, and the seat
comes free, put some weight on it and it lowers,

when

Quoted message said:

Quoted message said:

it's low enough release the lever and it latches, this time in a lower position.

It would be VERY nice to be able to adjust the seat height in very small increments so as to
relieve strain on long rides, but even a two

position

Quoted message said:

Quoted message said:

with a couple inches between high and low seems like a valuable gain to

me.

Quoted message said:

Quoted message said:

Dale ( Always inventing bike ) Benjamin [email hidden]

Sounds like you need the "Hite Rite" seatpost attachment that was all the rage in the early days
of mountain biking.

"Dale Benjamin" <[email hidden]> a écrit dans le message de :
"]news:[email hidden]...

Quoted message said:

Hi,

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

Quoted message said:

Other things you can do: get off the saddle when you stop

Still have to get back up, not the easiest thing with a very high seat. Staying on the saddle is
supposed to reduce traffic delays.

No, I can't believe this. Has to be a troll. You can't dismount and mount ? This is another reason,
I'll bet, the remote control for the TV came about. CD changers, replacing players. And, of course,
Lazy Boy recliners.....
--

Bonne route,

Sandy Paris FR

I wonder how many usage cycles can be expected, and how it will stand up to the stresses of
pedaling. Actually the older rack and stop mechanism might do, but again they're not designed for
the stress or many usage cycles.

In order to maintain bicycle and rider stability, it would seem important to maintain the seat's
alignment with the frame throughout the operation. If I were to fabricate from scratch I'd probably
try putting a key slot in both the inner and outer tubes to maintain that, which would also keep it
compatible with existing frames.

That done, it shoudn't be any great feat to attach a small housing with a spring loaded pin inside
attached to a brake cable so that when the handle ( on the handlebars! ) is pulled the pin is
retracted into the housing and the upper part of the tube is free to travel ( within limits ) under
spring pressure. Raise off the seat and it extends under you, sit on it and it falls, when it
reaches the limit, just release the handle and the pin snaps back into place through holes drilled
in both inner and outer seatposts. It's latched there until one pulls the handle again.

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

Quoted message said:

Dale Benjamin' may have said:

So in order to have a comfortable saddle height for possibly prolonged

stops

Quoted message said:

Quoted message said:

in traffic and another height for comfortable riding when one doesn't put

a

Quoted message said:

Quoted message said:

foot on the ground for a half hour at a time, why not develop a pop up seatpost?

Assuming there's a good reason not to want to simply hop down and straddle the frame instead of
staying on the saddle (which, in traffic, I admit, is not always practical), there's already a
mechanism in existence that would probably fit the bill, and could likely be adapted to bikes with
little re-engineering. The adjustable-height pressurized cylinder system from an office task chair
does pretty much what you're looking for. Some of them have an OD of about an inch on the cylinder
itself. I haven't closely examined the latching mechanism, but perhaps an interested person might
take the time to see if there's an opportunity here.

--
My email address is antispammed; pull WEEDS if replying via e-mail. Yes, I have a killfile. If I
don't respond to something, it's also possible that I'm busy. Words processed in a facility that
contains nuts.

"Matt O'Toole" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Dale Benjamin said:

a high saddle is extremely uncomfortable because the leg upon which one leans must be held fully
extended, and the foot as well must be held straight, that gets real uncomfortable quick,
leaning at an extreme angle gives me bad cramps.

There are some new bike designs this year, to address this very problem. They're lower to the
ground, with a slack seat angle, so you can put both

feet

Quoted message said:

on the ground while still in the saddle. Of course they're a compromise,

but a

Quoted message said:

good one for some riders. IIRC, Giant and Electra make these bikes.

Compact frames, yes. But with a monster seat post which permits full extension of the leg and foot
as in walking or running, the pedals are still a couple inches above ground.

Quoted message said:

Quoted message said:

So in order to have a comfortable saddle height for possibly prolonged stops in traffic and
another height for comfortable riding when one doesn't put a foot on the ground for a half hour
at a time, why not develop a pop up seatpost? Modify a conventional one by putting a second tube
within it, and a mechanism to operate a catch within the second tube ( or mostly solid rod,
probably ) so the catch can be retracted ( something like a bar end or thumb shifter to operate
it ) which lets the second tube move up ( under spring pressure ), or down ( under rider weight
). The catch would be spring loaded too. Maybe we can fill the old tube along the sides with
primo epoxy and shape the tube to fit, got to maintain the seat alignment with the frame. Maybe
it would be expeditious to fabricate both tubes/rods.

Find an old Hite-Rite, which were popular in the 80s for MTBs. Loosen the

quick

Quoted message said:

release while sitting on the saddle, and it drops 2". Unweight the

saddle, and

Quoted message said:

it pops right up again.

The Cam type QR isn't really designed for many hundreds of usage cycles. When it is loose the seat
has no fixed alignment with the frame, a bit of an unstable situation. And I'm supposed to open and
shut the thing again while shifting into low in three seconds while approaching a stop.

Quoted message said:

Matt O.