Ключевые слова: action, adrenaline, adventure, avocation, background, bike, competition, competitive, czech, danger, dangerous, dark, detail, dirt, europe, extreme, fun, helmet, hobby, interest, jump, land, male, man, motor, motorized, moving, mud, off, outdoor, person, power, race, relaxation, republic, riding, risk, road, speed, sport, summer, terrain, thrill, tire, track, vehicle, wheels, winner,