another coker on ebay

o

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Whoever is posting that unicycle obviously knows about unicycles. He
showed a top view to show the trueness of the wheel, a side view to see
the whole thing, and a closeup of the airseat conversion to show that
it's the real deal.
I wish I wasn't leaving for the Peace Corps next year. I'd love to have
a Coker, but I'm going to have to wait three more years... 🙁

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Here's a direct link to the ebay auction without the friggin redirect
through the adfarm mediaplex tracker:
'ebay: Coker 36\" Unicycle w/ airseat conversion'
(http://tinyurl.com/4srkb)

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john_childs said:

*Here's a direct link to the ebay auction without the friggin redirect
through the adfarm mediaplex tracker:
'ebay: Coker 36\" Unicycle w/ airseat conversion'
(http://tinyurl.com/4srkb) *

Sorry about the tiny URL (aka "friggin redirect"😉.

Jeez. Dude, have I disrespected you?

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steveyo said:

*
Sorry about the tiny URL (aka "friggin redirect"😉.

Jeez. Dude, have I disrespected you? *

I was complaining about the adfarm.mediaplex.com redirect. They're on
my block list so the redirect there does not work for me. There is no
need to bounce through mediaplex.com to get to an ebay auction.

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Darn that tinyurl guy! ;-)

steveyo said:

*
Sorry about the tiny URL (aka "friggin redirect"😉.

*

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mscalisi said:

*Darn that tinyurl guy! ;-) *

It's not the tinyurl redirect that is the problem, other than the fact
that if there was no need to hide the second redirect through
adfarm.mediaplex.com then there would be no need for the tinyurl link.

tinyurl redirects to adfarm.mediaplex.com which finally redirects to
ebay. There's no need for that. There is no need to hide a link to an
ebay auction in a referrer link or an ad link. There is no need to post
sneaky links here.

Here's the link that tinyurl redirects to:
http://tinyurl.com/4wf8v

Click on it if you want. It will take you to the ebay auction. It
doesn't work for me because I've got mediaplex in my block list.

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mscalisi said:

*Darn that tinyurl guy! ;-)*

Sorry. 😉

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paco said:

*Whoever is posting that unicycle obviously knows about unicycles. He
showed a top view to show the trueness of the wheel, a side view to
see the whole thing, and a closeup of the airseat conversion to show
that it's the real deal.
I wish I wasn't leaving for the Peace Corps next year. I'd love to
have a Coker, but I'm going to have to wait three more years... 🙁 *

If you didnt just look at the pictures 😄 you would have saw this.

Quoted message said:

-Originally Said by the guy selling the coker -
*Coker 36" unicycle with Myiata airseat conversion. Used but cared for
and well maintained. I am parting with it because I spend more time on
my smaller wheel. I'm also holding out for the much anticipated
release of the geared unicycle. *

This guy really does know about unicycles and what's going on in the
unicycle world.

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Tim said:

*This guy really does know about unicycles and what's going on in the
unicycle world. *

Unfortunately a geared unicycle is no replacement for a Coker. The
geared unicycles, like Blue Shift, don't ride very well. They are
nothing like riding in cruise control on a Coker. Yeah, the geared
unicycles can be fast, but that comes at a big cost in control. A
geared unicycle will not replace a Coker. The Coker still rules for
many distance riding tasks where the geared unicycles will prove to be
unsuitable. He really should keep the Coker and get the geared unicycle
as a supplemental unicycle.

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john_childs said:

*
Unfortunately a geared unicycle is no replacement for a Coker. The
geared unicycles, like Blue Shift, don't ride very well. They are
nothing like riding in cruise control on a Coker. Yeah, the geared
unicycles can be fast, but that comes at a big cost in control. A
geared unicycle will not replace a Coker. The Coker still rules for
many distance riding tasks where the geared unicycles will prove to be
unsuitable. He really should keep the Coker and get the geared
unicycle as a supplemental unicycle. *

Unfortunately I'm thinking along exactly the same lines as the seller. -
lighter, smaller Uni with the speed advantage of a Coker. the main
disadvantages I see are the loss of rolling momentum, lower sitting
height. I don't understand why there would be less control with a good
hub. could you explain please?

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Having significant experience with both, I agree. I wouldn't say that a
geared unicycle doesn't ride very well. With experience, I think you can
get reasonably used to it.

...However, it is no replacement for a Coker. On the geared uni, a small
lapse in focus gives you an abrupt UPD, and when you do UPD, you hit the
pavement hard and fast. A UPD on a coker is much more graceful (and less
likely).

With a geared 26", a skillfull person can turn on a dime, but on a
coker, the turns are much easier, almost like carving.

That being said, I'm very interested in what a geared 36" is like

john_childs said:

*
Unfortunately a geared unicycle is no replacement for a Coker. The
geared unicycles, like Blue Shift, don't ride very well. They are
nothing like riding in cruise control on a Coker. Yeah, the geared
unicycles can be fast, but that comes at a big cost in control. A
geared unicycle will not replace a Coker. The Coker still rules for
many distance riding tasks where the geared unicycles will prove to be
unsuitable. He really should keep the Coker and get the geared
unicycle as a supplemental unicycle. *

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mikepenton said:

*Unfortunately I'm thinking along exactly the same lines as the
seller. - lighter, smaller Uni with the speed advantage of a Coker.
the main disadvantages I see are the loss of rolling momentum, lower
sitting height. I don't understand why there would be less control
with a good hub. could you explain please? *

I have ridden Greg Harper's Blue Shift a couple of times. Not a lot,
but enough to learn what the thing is like. Blue Shift is a geared up
29er.

The forwards and backwards balance is more tricky than on a standard
unicycle. The balance envelope seems to shrink more than it ought to
given the virtual wheel size and the crank length. It required constant
focus and attention while riding. You have to pay attention to your
riding much more so than you do on a normal unicycle. It is much much
more difficult to recover from bumps and unexpected undulations in the
pavement than it is on a standard unicycle. Little bumps that would be
no problem on a standard unicycle can, and will, cause a UPD.

On a flat smooth bike trail the geared unicycle is a dream. Fun and
fast. A real thrill on what otherwise would be an uneventful ride on a
Coker. I rode the Blue Shift along a river bike trail and had a smile
on my face the whole time, (except for the times of sheer terror when I
thought I was going to loose it and crash).

On an urban hilly ride the Blue Shift is completely different. The Blue
Shift does not climb very well at all. Very difficult to maintain
momentum going up a hill. Very difficult to maintain balance while
going up a hill. These are hills that are trivial on a Coker, but I
found quite challenging on Blue Shift. This ride also included riding
on sidewalks with driveway cutout and curb cutouts. Those cutouts are
trivial on a Coker, but quite challenging on the Blue Shift. I had
several UPDs just trying to ride across driveway cutouts. There were
also intersections where the pavement was not even. The pavement gets
worn and wavy in old intersections. Trying to ride across those waves
was very difficult. I had a couple of UPDs because of that wavy
pavement.

On the flats the geared unicycle is fun fun fun. On hills the geared
unicycle sucks sucks sucks when in high gear. On uneven pavement the
geared unicycle is challenging to control. It's not unicycle nirvana.
It has faults.

I don't view the geared unicycle as a replacement for a Coker. There
are places where the Coker is much more forgiving and much more
appropriate. The geared unicycle is a supplemental unicycle for use in
addition to a Coker. I'd rather have a Coker first and a geared
unicycle second. The Coker is much more practical for cruising. For
example, the Coker is great for riding on dirt roads and smooth dirt
paths. The geared unicycle would be totally inappropriate in that
terrain.

All that said, I do want a geared 29er. It is fun and offerers a riding
experience that the Coker does not. But it will not be instead of my
Coker. My Coker will still get more riding time than the geared uni.

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I know we are getting further and further off topic, but...
For all you who have ridden the geared uni, do you think it would be
easier to ride if it used a smaller wheel? A wide, slick 24 perhaps?
I'd imagine you'd lose a lot of speed, but it's more compact and if it's
easier to control, might be more practical for getting between classes
or short commutes.

Why is Blue Shift so hard to ride in less then optimal conditions? Is
it just because it's geared up and your mind has trouble dealing with
it? Is it slop in the gearing? Is it the lack of the flywheel effect
because of the lighter smaller wheel?

john_childs said:

*
A geared unicycle will not replace a Coker.*

I’d like to think that a geared uni would one day be able to do the job
of a Coker. Maybe not with the current gearing technology, but some
time in the future.

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daino149 said:

*Why is Blue Shift so hard to ride in less then optimal conditions?
Is it just because it's geared up and your mind has trouble dealing
with it? Is it slop in the gearing? Is it the lack of the flywheel
effect because of the lighter smaller wheel? *

I don't know. It would be interesting if someone did an analysis of the
physics to try and answer that question. There have been some physics
papers describing how it is possible to ride a unicycle. It would be
interesting if that same style of analysis was done to figure out what's
different between a standard unicycle and a geared unicycle.

When you ride a geared unicycle it definitely feels like something is
different in the physics of riding the thing. I don't know what it is
or why it is. My theory is that the forces on the torque arm of the
geared hub have some sort of affect on the balance. The torque are is
attached to the frame when the hub is geared up. The harder you pedal
the more force there will be on the torque arm. I don't know if the
force on the torque arm is enough to affect how the unicycle rides, but
it might be. Sudden changes in torque, for example when trying to
recover from a bump, could also have an effect. When climbing there is
also more torque, and that could be why climbing with the geared
unicycle feels so strange and balance is more difficult.

Maybe someone could make a Segway style unicycle to compare the geared
hub. Make a Segway style unicycle with a geared hub and compare the
balance corrections needed with the same Segway style unicycle made with
a non-geared hub.

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you reallywouldnt believe how big a coker is until you have ridden one

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I'm not sure if it would be easier on a smaller wheel. I've only ridden
one size (26"😉 so I can't compare. I think I've heard others mention
otherwise. I'd be interested in what Kris Holm has to say about this
since he has a geared 36er.

I think the thing that makes the geared uni harder to ride is that small
changes are amplified. Small bumps act like larger bumps.

...on the hill climbing, the seat/frame wants to full forward when you
try to stand up going uphill. This makes it harder.

I don't think the difficulties have much to do with slop or the flywheel
effect. I think it really has to do with the amplification effect. This
is why I wonder if a 36er might actually be easier since that wheel
size is already good at smoothing out irregularities.

I also don't think better gearing technology will help much. Even if you
completely eliminated slop and the gearing was completely smooth, the
fundamental behaviour of the cycle would not be drastically altered.

daino149 said:

*I know we are getting further and further off topic, but...
For all you who have ridden the geared uni, do you think it would be
easier to ride if it used a smaller wheel? A wide, slick 24 perhaps?
I'd imagine you'd lose a lot of speed, but it's more compact and if
it's easier to control, might be more practical for getting between
classes or short commutes.

Why is Blue Shift so hard to ride in less then optimal conditions? Is
it just because it's geared up and your mind has trouble dealing with
it? Is it slop in the gearing? Is it the lack of the flywheel effect
because of the lighter smaller wheel?

I’d like to think that a geared uni would one day be able to do the
job of a Coker. Maybe not with the current gearing technology, but
some time in the future. *

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mscalisi said:

*...on the hill climbing, the seat/frame wants to full forward when
you try to stand up going uphill. This makes it harder. *

Yes, that is what I noticed too. I think that may be because of the
torque arm, but I'm not sure. The torque arm is pushing the frame
forward. Normally when you climb you try to get in front of the
unicycle and lean a little bit forward. You can't do that on the geared
unicycle because it wants to dump you off the front when you do that.
When climbing with the geared uni you can't lean as far forward which
makes climbing much more difficult.

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john_childs said:

I don't know. It would be interesting if someone did an analysis of the
physics to try and answer that question. There have been some physics
papers describing how it is possible to ride a unicycle. It would be
interesting if that same style of analysis was done to figure out what's
different between a standard unicycle and a geared unicycle.

I'm not sure if I'm up to it but I might one day give that a go. I'm
on Schlumpf's list of people interested in their geared 29'er.

Quoted message said:

My theory is that the forces on the torque arm of the
geared hub have some sort of affect on the balance.

That might well be it. If it is, it's probably becoming easier with
more riding experience. As in that you anticipate the frame to tend to
fall forward if you torque more.

Analogue: I normally pull my seat handle with my left hand (if I pull
at all, that is). That tends to tilt the unicycle backward but I
automatically compensate and don't even notice. If I on occasion
(variety is the spice of life) pull with my right hand, I am (to some
degree) taken by surprise by the uni 'falling' backward. The automatic
reaction is not yet as engrained there, but it would undoubtedly
become with more practice. Same I think with the torque arm reactions.
You would compensate automatically once you have unconsciously figured
out the reaction pattern.

Klaas Bil - Newsgroup Addict
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