Ключевые слова: bicycle, bike, chain, cheap, circle, city, comfort, concrete, convenient, cycle, cyclist, environment, everyday, exercise, fitness, floor, gear, lane, leisure, lifestyle, movement, pedal, pollution, race, rent, ride, rim, road, roll, round, row, rubber, saddle, series, sidewalk, sport, steel, symmetric, symmetry, tire, traffic, transport, transportation, useful, walk, walkway, way, wheel,