Abstract: A compactable bicycle comprising a frame including a first and second frame portions wherein the frame is unfoldable to a use position for riding by the rider and is foldable to a storage position for storage. The bicycle includes: a rear brake, a rear brake lever, a rear break cable passes through a first cable guide, and a brake cable biasing member that is positioned to urge the rear brake cable back through the first cable guide to be between the first cable guide and the rear brake lever: front and rear wheel connectors to hold the front and rear wheels together: a crank, a front sprocket, a rear cassette, rear sprockets, a chain, and a derailleur; a chain guide that is positioned to engage the chain and to limit a lateral angle of the chain relative to the rear sprocket: or first and second frame element locking surfaces and apertures, and a plunger movable to a clamping position and to a release position.

Abstract: In an aspect, a compactable bicycle is provided, comprising a base frame portion and a steering structure, at least one of which has a first and a second frame element. Each frame element has a locking surface, an end, and an aperture. The frame elements are positionable in a first position wherein the first and second apertures are aligned and the locking surfaces face away from one another, and in a second position in which the apertures are unaligned. A plunger has first and second plunger locking surfaces and is movable to a clamping position where it extends in both the first and second apertures and engages the first frame element locking surfaces, and a release position wherein the plunger retracts from the second aperture sufficiently to permit the first and second ends to be separated from one another.