Ключевые слова: abstract, background, bicycle, bike, biking, black, brake, broken, chain, chains, chrome, circle, close, closeup, cycle, cycling, equipment, exercise, fitness, frame, gear, gears, isolated, machine, macro, metal, mountain, object, old, part, parts, pedal, rear, red, retro, ring, rust, spoke, sport, steel, technology, tire, transport, transportation, up, vehicle, vintage, wheel, white,