Ключевые слова: action, active, alone, athlete, bicycle, bike, biker, biking, bmx, cardio, caucasian, challenge, cycle, cyclist, extreme, forest, freestyle, handsome, helmet, leisure activity, male, man, mountain bike, mtb, nature, outdoors, people, person, protective, rear view, ride, rider, safety, sport, sportive, sportsman, sporty, transport, transportation, trees, trial biking, young adult,