Ключевые слова: activity, air, bicycle, bike, black, chain, cycle, day, derailleur, drive, field, fitness, foot, gear, gearwheel, grass, green, heel, leg, leisure, meadow, mechanism, old, outdoors, pedal, pinion, rear, ride, rim, rubber, spoke, sports, steel, summer, sun, tire, tourism, travel, tread, tyre, view, vintage, wheel, white,