Briefcase unicycle

I've thought about something along these lines too. I think a 20" wheel
would be possible. The frame could maybe have a quickrelease seattube
similar to aluminum crutches, with a spring-loaded pin. The pedals could
snap in the same way, with a pin on the crank. Either that or snap-on
cranks, but that might be a lot weaker. Depends on the type of riding.
It'd also be pretty cool if you could figure out a way to gear it up
without taking up too much space, so you could go faster.

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thejuggler24 said:

*This has often been a fantasy of mine. I unicycle that fits into an
average looking breifcase, My friend and I are currently thinking one
up. We have thought about a wheel that folds in half, a telescoping
seapt post, folding pedals and such. Currently we are thinking about
having a smaller wheel, such as a 16 inch one with the fors already
attached and possibly telescoping. The only think I am worried about
is stability and the strength of the thing. I do believe that it would
be an amazing thing to have, and I am sure you do too. It would be a
unicycle that would be there when you need it, anytime.

Ill keep working on it and possibly post some pictures if the project
ever gets off the ground. *

Seems to me that it would be possible. With enought ingenuity, anything
is. Problem would be that the foldable unicycle probably wouldn't be
much good for performance or extreme stuff, just easy riding.

When we went to Seattle in 2002, we disassembled and packed five
unicycles in suitcases. We purchased another uni while we were there
so had to buy an additional suitcase at a yardsale for the return home.

Bruce

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... James Bond Uni 🙂

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One of our long term projects that may be coming to fruition this summer
is a 5 foot/7 foot CrMO duel chain giraffe... that dissassembles using
quick releases to fit in a box that is only 2 foot x 2 foot x 9 inches.
It takes about 5 minutes to dissassemble and about 10 to assemble.

We have had a couple of samples already and have not been satisfied with
the design (there is a lot of design and testing needed in those
joints). I am just about to autherise the production and with luck it
will be available through Unicycle.com's in the summer.

Roger

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Have you looked at 'Pichler' (http://www.pichlerrad.de/de01.htm)
unicycles, the frame can easily be taken apart by removing the allen
bolts in the crown

The frames are quite strong and wide enough to fit most tyres.

You could pack it in a case and to reassemble just bolt the crown up
again and put the pedals back on

I have tried lots of folding pedals but never found any decent ones

jim

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sorry it should have linked to this 'picture'
(http://www.pichlerrad.de/Bilder/solotech1.JPG)

jim

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Jim said:

*Have you looked at 'Pichler' (http://www.pichlerrad.de/de01.htm)
unicycles, the frame can easily be taken apart by removing the allen
bolts in the crown

The frames are quite strong and wide enough to fit most tyres.
*

Hmmm, this frame for a Schlumpf would be nice . . . 😎

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Wayne van Wijk has a unicycle which fits in a suitcase. I'm pretty sure
its a mini-giraffe and has a 16" wheel. He uses folding pedals, but
doesn't ride it hard so they are OK for him.

A wheel that folds in half would be a very weak wheel. How would you
secure it? Moreover how would you lace it? It would be 100 times easier
just to use a standard 12" or a 16" wheel instead.

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All very good ideas of course. The only thing is is that I don't want to
have an overly large briefcase. I'd like it to be an average size, not a
huge one, although that seems like the only thing that could accomidate
a wheel large enough with the fork still attached. As for the pedals,
'these' (http://tinyurl.com/48u3q) look reletivly sturdy.
I am liking the idea with the seat as a telescping thing with the spring
pins like a cruth. I can see that working. What I really want is for it
to be very practical and for the assembly time to be at the minimal.

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thejuggler24 said:

* As for the pedals, 'these' (http://tinyurl.com/48u3q) look reletivly
sturdy.
*

I have a pair of those pedals, they may be sturdy but not very grippy,
my feet are forever slipping off them

jim

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Quoted message said:

One of our long term projects that may be coming to fruition this
summer is a 5 foot/7 foot CrMO duel chain giraffe... that
dissassembles using quick releases to fit in a box that is only 2 foot
x 2 foot x 9 inches. It takes about 5 minutes to dissassemble and
about 10 to assemble.

That sounds amazing. I really hope that goes into production, because I
would most likly buy it. After putting more thought into our project, it
seems that we would need more of a suit case than a breifcase for the
unicycle to fit in, and that is no good. I also want it to be able to be
assembled very quickly, like the speed of the quote there. I am now
considering quick release pedals as well.

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And a 12 or 16 inch wheel is not a very fun ride. If you had to sum up
the ride in a noise, it would be like "EeErEeErEeErEeErEeErEeErEeEr"
really fast, if you catch my drift. Very jekry and uncomfortable due to
the short cranks.

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well if that guy on the t.v. can fit a petrol driven go-kart big enuf
for him to ride ina briefcase then maybe we shud wrk on getting a uni in
there. ud only need a small wheel just with a 2:1 gear ratio like a mini
graiife?

bungle

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*a small wheel just with a 2:1 gear ratio like a mini graiife* > *a small wheel just with a 2:1 gear ratio like a mini graiife*

That is a fantastic idea. I think we are going for a 12 inch wheel, so
the 2:1 ratio would proabably work nicely.

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Make a 12 wheel geared to ride like a Coker!!!

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You could use an 'S&S Coupler' (http://tinyurl.com/5dqz9) to be able to
easily disassemble the frame.

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Quoted message said:

Make a 12 wheel geared to ride like a Coker!!!

Ehehehehe.

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The S&S coupler seems interesting. Of course, that Pikcher fork could
also work nicely.

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It sounds like nobody has done much measuring yet. The key problem area
is *width*. Unicycle axles are probably twice as wide as a standard
briefcase. So without re-engineering the whole axle & crank system, you
might want to start off by thinking in terms of a giraffe wheel.

Alexander Frisch of the Moscow Circus used to enter the ring with a
suitcase, from which he produced a little unicycle and rode it around.
But this was a larger suitcase. The unicycle had something like a 12"
wheel.

My assumption is that you want a "useful" unicycle when this is done.
This means something bigger than 12", or even 16". Without gearing, this
means a wheel taller than a briefcase. So, a geared-up mini-giraffe. It
will be a bumpy ride, but you should be able to gear it to 20" or even
larger. Just watch out for bumps!

I'd start with the basic concept of one of these:
http://tinyurl.com/ydh8

Then you'd probably want to figure out a wheel that's as big as you can
fit in there, because those little wheels don't ride very smooth.

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