The Kwiggle bicycle folds down so small, it be taken on an airplane as carry-on luggage. It was designed by Karsten Bettin, a German engineer under the idea it would fit under the seat of your car or be able to be stowed away in the overhead compartment of an airplane. At a weight of about 19 pounds (around 8.5 kilograms) it folds-up into a 55x40x25 centimeter carry-on bag.
Apparently, orthopedic specialists love the Kwiggle! The upright seating position of the bike is able to support the back minimizing the usual tension associated in the neck area. Did we say it can also be folded away in only 10 seconds! Well there it is in a nutshell!