This is a bicycle that folds and becomes a unicycle.
-- JesusHChrist, Sep 17 2012

Fold it a second time to make a pogo stick?
-- pocmloc, Sep 17 2012


Fold it twice the other way for four wheels.
-- rcarty, Sep 17 2012


Interestingly, this could actually be done …
-- 8th of 7, Sep 17 2012


//Interestingly, this could actually be done …//

So can "Stars In Their Eyes". The number of things that can be done is, almost by definition, greater than the number of things that both can and should be done.
-- MaxwellBuchanan, Sep 17 2012


Cut it in half and have one for a friend. Could even become an Olympic event. Unicycle tandem racing.
-- Lesser Spotted Kiwi, Sep 17 2012


I'm not so sure it can be. The loading of a bicycle is, inherently forward of the rear wheel, as is the drive train. The loading and drive train (if it has one) of a unicycle are directly above the wheel. I think there may enough topologic difference to make the one not fold into the other.
-- MechE, Sep 17 2012


Given that it's possible to sustain a wheelie on a bicycle, I'm pretty sure that suitable origamitechnics would enable unicycular progression.
-- MaxwellBuchanan, Sep 17 2012


It could fold so one wheel drives the other wheel by friction.
-- rcarty, Sep 18 2012


It might even be thought of as a unicycle that unfolds to become a bicycle...
-- 2 fries shy of a happy meal, Sep 18 2012


This is a fishbone that folds and becomes a "how?".
-- baconbrain, Sep 19 2012


The advantage of this is that you could push it through the subway instead of having to lug it on your back like you would with most folding bikes.

Borrow-a-bike stations are becoming very popular in my city,but you can't get them into the metro.
-- JesusHChrist, Jun 03 2013


Mr. [Christ] (re. above anno) - I think Brompton put very small wheels at the back of their bikes in the folded position so that they can be wheeled like those trailing suitcases.

As for the penny-farthing being nuts, the large diameter wheel avoids the use of gears or sprockets and allows a smoother ride over bumps. That said, I have a friend with a 'kangaroo' which has a 3ft (ish) front wheel which is connected via a chain (pedals still turn with the wheel though).

Generally a good idea though. [+]
-- TomP, Jun 04 2013


Where does the second wheel go?
-- BunsenHoneydew, Jun 15 2013


The second wheel attaches to the first wheel. Detahable pedals can be attahed to the outsides of the wheel pair. .
-- JesusHChrist, Jun 16 2013


A smoother ride over _small_ bumps, [tomP].
-- pocmloc, Jun 16 2013



random, halfbakery