Sugino Super Gigas cog

DescriptionGigas is a very hard, ultralight aluminum alloy material with a tensile strength greater than 1 Giga Pascal. The specific strength is more than twice as high as that of heat-treated chromoly steel.These professional race level cogs are extremely high quality, perfectly round, very smooth, and feature a brilliant silver or gold anodized finish, or platinum S-Cubic (S3) coating.S-Cubic coating is smooth, very shiny and combines high hardness with low friction to minimize chain resistance and achieve more effective power transmission. FYI: All track cogs have 1.37″x24tpi threading. ALL OF THEM. Any threaded cog can be used on any threaded track hub. specifications• standard 1.37″x24tpi threading• chain compatibility: 1/8″• sizes: 13-19t