BICYCLE

摘要

The front and rear wheels are moulded with hubs (9a) open to one side and with a central fixing hole. The hubs are secured over hub fittings on the frame. The front wheel (8a) has a one-side fork support (1) and the rear wheel is similarly supported by a one-sided frame. The hubs contain identical internal brakes (22). The brake mechanism is taken through the hollow frames and has no external levers. The rear wheel is driven by drive couplings through the one-sided frame.