Foldable bicycle

A portable foldable bicycle comprising a main frame divided into a front frame part and a rear frame part which are hingedly connected together, a front fork and a steering assembly hingedly connected to the front frame part, a saddle supporting assembly hingedly connected to the rear frame part, and locking means provided in operative association with each of the hinged connections, and in which the front and rear parts of the main frame are of generally box shaped cross section and a hinge pin is arranged adjacent one side thereof to permit the two parts to be positioned side by side in the folded position and including a foldable front stay which is hingedly connected at its ends to the front tube and to the rear end of the front frame part, and in which adjacent inner ends of the front stay are hingedly interconnected and a spring loaded sleeve coacting with a collar is provided to lock the stay in an in line position.