21S,high carbon steel/AL alloy(copy carbon fibre) frame,baked paint internal stickers,shock-absorbed front fork,dual disc brake,domestic transmission system(Tai Chang 51 derailleur lever,50 rear derailleur),sealed bottom bracket,positioning tower wheel,aluminum alloy bearing hub,natural rubber inner tube,Hengqi/Universe/Jusheng 1.95tire,packaged in a cardboard box.