Ключевые слова: alloy, aluminum, bicycle, bike, chain, chainring, close, closeup, cluster, cog, cogwheel, component, crankset, cycling, engineering, equipment, gear, gearing, gearshift, gearwheel, grease, group, iron, macro, mechanics, mechanism, metal, metallic, objects, part, race, repair, ride, ring, sharp, shift, shifting, speed, sport, sprocket, steel, technology, tooth, toothed, transmission, transport, transportation, wheel,