AI-assisted concept

Stroke

Folding city bike

Stroke folds at a single central hinge in about eight seconds, small enough to carry onto a train. Bolted, not bonded: every part of the frame and hinge can be serviced or replaced.

Category: Mobility
Materials: Recycled aluminium
Processes: Hydroforming, CNC machining

Stroke folding city bike in dark grey aluminium, side view on a black background

Pencil sketches of the Stroke folding bike, folded and unfolded, with close-ups of the central hinge — Frame geometry and hinge studies: one fold point means one simple gesture.

Close-up of Stroke's machined aluminium hinge and cam lever on the silver frame — The machined aluminium hinge with its cam lever locks the frame without play.

Raw machined Stroke frame and a wheel on a workshop bench with drawings and tools — A CNC-machined frame on the bench, tested for stiffness before casting.

Silver Stroke folding bike parked outside a modern building entrance beside a potted olive tree — Ready for the city: compact wheels, upright position and a frame that disappears when folded.