Bicycle helmets; aerodynamic bicycle helmets; aerodynamic attachments for bicycle helmets; ventilating, heating and cooling elements for bicycle helmets; visors for bicycle helmets; optical coatings for bicycle helmet visors; face shields for protective bicycle helmets; chin straps for bicycle helmets; cases, housings, and accessories for bicycle helmets; mounting devices for bicycle helmets for attaching electronic devices for recording, storage, transmission of sound, images and data; mounting devices for bicycle helmets for attaching cameras, lights, direction indicators, sports glasses and air pumps; mounting devices for bicycle helmets for attaching energy food, energy drinks and water bottles; safety lights mounted on bicycle helmets; display apparatus mounted on bicycle helmets; spectacle lenses for cycling; sports glasses; cyclist's glasses; sunglasses; clip-on sunglasses; protective glasses; data processing apparatus and computers for bicycles; communication systems mounted on bicycle helmets; protective equipment for cyclists, including vests, jackets, jerseys, pants, gloves, shorts, helmets, footwear, clothing for protection against accidents