24" Gunis (geared unis)

Yes. Without riders they will be stationary. They will go the same
speed....zero.

--
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-Greg Harper

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mornish said:

I was wondering, will a 24" guni that's geared up to coker size be able
to keep up with a coker(s)?

also, will you need longer cranks to keep it controlled?

I don't know but if I ever got a whole bunch of money all the sudden I
would want to gear up my muni with that new splined geared hub. That
would be the best combo of a geared uni for me, I don't do long
distance but it would be nice to be able to ride to some farther away
spots and still have a strong uni to play on when I get there🙂

--
Spencer Hochberg

(disclaimer: i may not know what i am talking about)

Evan said:

i just found some candy in a suitcase under my bed, i have no clue how
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if it is geared the up to be as fast as a coker than it will go as fast
as a coker. i would like to see a geared up coker that could go really
really fast

--
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mornish said:

I was wondering, will a 24" guni that's geared up to coker size be able
to keep up with a coker(s)?

Given the same rider and the same length cranks, I'd expect a coker to
be slightly faster than a small uni geared up to coker size. Geared
unicycles are nice, but you don't get 100% of the way to the wheel
size, because you're missing other things that the coker does.

Like Spencer says, they're great for getting you to the trails to ride,
but they aren't as nice as a big wheel for just riding distance,
require a fair bit more concentration.

They do have some advantages over a coker though, other than being okay
for muni once you get there, they're light compared to a coker, which
is a nice thing and makes it quite easy to flick around.

Joe

--
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I've not ridden a Guni but I'd expect the coker to be a fair bit
faster. The 24" would probably still be able to go along at quite a
rate, but the extra stability and bump-handling provided by the Coker's
big wheel would make it easier to maintain a high speed for useful
distances.

On the other hand, the guni would retain the 24" light weight so it'd
be easier to flick the thing about.

--
mark williamson

Dave: Just a question. What use is a unicyle with no seat? And no
pedals!
Mark: To answer a question with a question: What use is a skateboard?
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I've ridden Kris Holms geard muni, and I've ridden a coker, but both for
less than 5 minutes total so I couldn't really tell much about the
differences..

One thing for sure, it's weird to be going fast on long(ish) cranks!
But I'm sure it could keep up with cokers, except in an all out race.
Because really, it won't be all *that* much slower, and who rides a
coker as fast as they can possibbly can anyway?

--
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tomtrevor said:

.I would like to see a geared up coker that could go really really fast

I think harper's blueshift is a geared up coker.

thanks for the info.

--
mornish

Quoted message said:

<>UNICYCLING FOR MYSLELF TOO<><

trials_uni said:

Where did you hear that Bedford unis are not strong? They are the best
thing since sliced bread!!

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Blue Shift is a geared-up 29er. Mike Scalisi has a geared-up Coker
based on one of Harper's hubs. The geared-up Coker is quite scary at
speed, and Ken Looi got his compound fracture on a fall from a
geared-up 29er. I think we're already stretching the limits of
prudence.

--
tholub
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thanks.

--
mornish

Quoted message said:

<>UNICYCLING FOR MYSLELF TOO<><

trials_uni said:

Where did you hear that Bedford unis are not strong? They are the best
thing since sliced bread!!

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Interesting how almost no one answering so far has any experience with a
geared uni.

The answer is that a Coker would be faster, all other things being
about equal. A geared uni has a lot more momentum to overcome due to
the gearing. When I ride my guni, which is a geared 29", it's really
hard to push the pedals in high gear. The same phenomenon would be
observed, to a lesser extent, in a 24" guni. The other thing is that my
guni is heavier than it looks due, among other things, to the heavy hub
and the sturdy frame it necessitates. I'd guess it's not much lighter
than a Coker, if at all, so you're not going to make up a big
difference there.

I've ridden uni.5 (Harper's first geared uni), which was a 24" geared
to ride as a 36". It was a good deal slower than my Coker, even when I
rode down a long downhill.

--
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Ok, from someone who has ridden both a 29'er Sclhumpf and a Coker....

On the flat a Schlumpf 29'er is definitely faster. I was about 2-3secs
faster per minute on the 400+m circuit I used for my 24hr record on the
Sclumpf 29'er with 125mm cranks compared with the Coker at 102mm
cranks.

For up and down it depends how much up and down there is and how fast
you are at shifting gears. I estimate that even a fast shift will lose
you about 50m compared to a Coker. You have to slow down, shift, then
speed up to catch the Coker.

Interesting note- the Marathon Road race and 10km Road Race at Unicon
13 were both won on Cokers. In fact, the fastest Schlumpf (Tony Melton
riding my 29'er) was in fifth place, behind four Cokers. Same with the
10km race. I think that was more due to the fact that shifting the
29'er would lose you 50m to a Coker, so Tony only shifted once during
the entire race. Essentially it means he was riding a 46" wheel almost
the entire time. I think I could have gone faster on my Schlumpf, but
I'm pretty slow at shifting and also most of the fast guys were on
Cokers so I guess we wanted to keep things fairly even. It was a fun
race.

Ken

--
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Quoted message said:

among other things, to the heavy hub and the sturdy frame it
necessitates. I'd guess it's not much lighter than a Coker, if at all,
so you're not going to make up a big difference there.

I'm sure my Schlumpf weighs significantly less than my coker, even with
the super-sturdy frame I've got on mine. The coker is almost all stock,
but I don't think you save *that* much weight by using an airfoil rim
on the coker. I'd guess the difference in tyre weight between coker and
29er is significantly more than the difference in hub weights.

The KH schlumpf won't need the silly frame because of the bearing
holder design, so the only difference in weight over the KH muni should
be the hub.

Like Ken says, the Schlumpf 29er is a little faster than a coker on the
flat. I'd say nowhere near as much faster as the 45" / 36" ratio would
suggest though, which is why I agree with David that the Schlumpf 24
which would gear up to only just over 36" would be slower than a
coker.

Incidentally, I dunno if Roger's changed his mind, but a couple of
weeks back he was saying that he didn't reckon the geared up coker (36"
geared to 54"😉 was up to much, and that he was actually faster on an
ungeared coker. Was he one of those front four cokers at unicon by any
chance?

Joe

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joemarshall said:

Incidentally, I dunno if Roger's changed his mind, but a couple of weeks
back he was saying that he didn't reckon the geared up coker (36"
geared to 54"😉 was up to much, and that he was actually faster on an
ungeared coker.

Sorry, bit of a thread jack, but...
I would imagine a geared DOWN coker would be quite useful (with 1:1
drive and a lower gear instead of the 1.5:1). Schlumpf make a geared
down version of their bike bottom bracket, so I wonder how much it
would take to do a unicycle hub like that... perhaps there wouldn't be
the demand to make it worth the effort. Most people seem to think a
direct drive 36" wheel is a high enough gear, but it would be good to
be able to change down for a hill.
But having ridden neither a coker nor a guni I'm not best qualified to
comment :o

Rob

--
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'Dartmoor Muni Weekend'
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joemarshall said:

.... Was he one of those front four cokers at unicon by any chance?

Joe

Yeah, Roger was one of them. He was going 'slowly' under doctors
orders after breaking his wrist, though.

Here's the medics keeping a close eye on his speed:

[image:
http://www.unicyclist.com/gallery2/main.php?g2_view=core.DownloadItem&g2_itemId=224482&g2]

--
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When Roger says he's going slow don't believe it 😉

The marathon was an awesome race- yes, Roger was one of the 4 Coker
riders at the front- we held a little peleton for most of the first and
second laps. Just like bike racing only better!

--
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nickjb said:

Here's the medics keeping a close eye on his speed:

That picture is from track racing though, not the Marathon. It doesn't
look like a Coker. I think it is the 700c 1500 m race.

And Rob Northcott: Florian Schlumpf told me during UNICON that a
geared--down- Coker is being considered, but it will still take two
years or so due to other priorities such as the splined geared-up hub.

Klaas Bil

--
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rob.northcott said:

Sorry, bit of a thread jack, but...
I would imagine a geared DOWN coker would be quite useful (with 1:1
drive and a lower gear instead of the 1.5:1). Schlumpf make a geared
down version of their bike bottom bracket, so I wonder how much it
would take to do a unicycle hub like that... perhaps there wouldn't be
the demand to make it worth the effort. Most people seem to think a
direct drive 36" wheel is a high enough gear, but it would be good to
be able to change down for a hill.
But having ridden neither a coker nor a guni I'm not best qualified to
comment :o

Rob

Funnily enough, I spoke to Florian last week and he said that one of
the first questions he was asked when he released the product was
'could you use it to gear down a unicycle'. He said that while ratios
of less than one were possible, the cost of producing different hubs
meant that at the moment he could only offer one ratio, as there was
not enough market demand to cover the development costs of two
different hubs. He did say that if enough of the current hubs sold then
he would have the budget in the future to develop and sell hubs of
different ratios, possibly including a down gearing.

--
kington99

Dave

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A few more spcifics:

When I rode my Coker to work in the past, the 8.4-mile trip took just
under 45 mins. On my guni, riding only in high gear, the same trip has
taken me as little as 37:45. Clearly the Schlump has cut time on the
relatively long straightaways, even when they're hilly (for example,
the Brooklyn Bridge is now under 6 mins of the trip, wheras it used to
take just over 7). A Coker is faster for the limited street/sidewalk
riding that I have to do for this commute, but thankfully that isn't
much of the trip.

More specific specifics: my top Coker speed was 21mph when riding with
110mm cranks. Riding the same downhill on my 29" guni with 125s, my max
speed was 'only' 22. As noted earlier, this was not as large a jump as
might have been estimated (I thought I'd be able to hit 24 or 25).

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mornish said:

I was wondering, will a 24" guni that's geared up to coker size be able
to keep up with a coker(s)?

I have ridden both a Coker, and a 24" Schlumpf (which has a virtual
diameter slightly more than a Coker, i.e. about 37" versus the 36" of
a Coker).

The answer to your question would depend on the crank length, and on
the experience the rider has on both unis But in general I would say a
Coker is faster because it is more stable.

Klaas Bil - Newsgroup Addict
--
"I'm slowly but surely stealing Wales and bringing it back to my house on the wheel, frame and cranks of my muni. - phil"