The Littlest Little Bike?

The littlest little bike — the MiniMax — has a folding mechanism built in which allows you to fold the bike in half lengthwise. The handlebars fold down and the pedals fold in to give you a small package - ideal for back seats, trunks, or most small spaces.

Folded, the MiniMax is much smaller than a regular size non-folding bike, and can be carried under your arm or placed in its own carring bag for transport.