Sada Hubless Foldable Bike

hubless bicycle innovation, foldable urban transportation, polished aluminum construction, navy elastomer tires, cognac leather saddle, transit platform setting, circular void geometry, negative space wheels, metallic silver surfaces, crimson red structural panel, warm amber station lighting, cool gray terrazzo flooring, bokeh background atmosphere, mixed artificial illumination, specular highlights on metal, brushed aluminum finish, mirror-bright polished details, asymmetrical compositional balance, diagonal vector movement, rule of thirds deployment, layered spatial depth, sharp foreground focus, atmospheric perspective recession, contemporary industrial design, modernist aesthetic vocabulary, Bauhaus functional influences, precision engineering details, articulated folding joints, telescoping frame elements, enclosed chain drivetrain, traditional bicycle proportions, radical wheel architecture innovation, early twentieth-century handlebar curves, artisanal leather craftsmanship, visible stitching details, machined metal surfaces, tactile material contrasts, hard edge definition, soft atmospheric dissolution, urban mobility celebration, sustainable transportation design, technological optimism register, material honesty expression, threshold moment capture, metropolitan infrastructure context, standing eye-level viewpoint, sculptural object presence, functional tool consideration, arrival-departure suggestion, autonomous navigation enablement, innovation-tradition reconciliation, portability-integrity balance, aesthetic-engineering synthesis, craft tradition honoring, visionary design thinking, transformative everyday object, efficient mechanical poetry, urban movement patterns, sustainable living facilitation.

The Sada Bike is a hubless, foldable and portable bike with 26 inch wheels. The wheel size allows to have an ergonomic posture in the ride version like a classical bike. The structure design allow to support each wheel in 3 points: the front ones are inserted in the fender structure, while the rear ones are allocated inside the rim. The chain transmits the motion to the lower wheel that transfers torque to the rim. The folding system has a fulcrum in the center that allows to close all frame. The bike can be put into a trolley and the absence of spokes leaves the space to insert other things.