Ключевые слова: aluminum, background, bicycle, bicycle chain, bicycle parts, bike, biking, chain, chrome, circle, closeup, cycle, derailleur, equipment, frame, gear, gearshift, industry, iron, machine, machinery, macro, mechanism, metal, metallic, outdoors, part, pedal, pedal system, race, rubber, rust, sharp, shift, shiny, spoke, sport, sprocket, star, steel, technology, teeth, tire, transport, transportation, vehicle, wheel,