Ключевые слова: background, bicycle, bike, cassette, chain, chainring, chrome, circle, closeup, cogs, cogwheel, component, cycling, disc, disk, drive, equipment, gear, gearing, gearshift, gearwheel, group, iron, isolated, machine, macro, mechanical, mechanics, metal, metallic, mountain, mtb, nobody, object, part, pinion, rear, ring, set, spare, sports, sprocket, stainless, steel, system, teeth, train, transport, wheel, white,