folding bicycle

Bike Friday: described as "the world's leading performance travel bicycle."

The Brompton is a bike which rides well, is safe, and yet folds easily into a very compact and portable package

They have different types of foldable bicycles.

Folding bike being sold in Target for 300 bucks. You can get it in Yellow, Charcoal or Black. * Portable bike collapses to fit in trunk * Goes from full-size to portable in seconds * 16" wheels, 5 speeds, Shimano derailleur * V-brakes, a 2-tone comfort saddle, kickstand, reflectors and bell

They are custom made, and not cheap. But if you want a bike that could fit in luggage with no detriment to frame strength, look no further.