The Helix is a Folding Bicycle, invented by Toronto's Peter Boutakis, that is claimed to fold smaller than any other bike, thanks partly to its jazzy lightweight titanium frame.
The Helix pivots on helical hinges, while its two 24-inch wheels fold in against either side of the single-piece frame. When the handlebars are folded down, the seat lowered and the pedals flipped inwards, the end result is a folded package that measures just 23 x 25 x 9 inches. Incredibly, the wheels still turn when the bike is folded, making it easy to be carted along like a piece of wheeled luggage. At 21 pounds, the Helix is also among the lightest folding bicycles around.
The Helix folding bicycle is currently the subject of a Kickstarter campaign, with a pledge of $1,199 getting you one.