Ключевые слова: action, active, adult, adventure, athlete, autumn, background, bicycle, bike, biker, caucasian, competition, creek, cycle, cyclist, dirt, down, exercise, extreme, fall, fitness, forest, fun, healthy, helmet, hill, leisure, lifestyle, male, man, motion, mountain, mountain bike, mtb, nature, people, race, recreation, ride, rider, riding, road, speed, sport, track, trail, transport, travel, wheel,