The fabled Gold Medal Pro track cog--13T to 18T. In 1/8 only. For
professional track racers. Perfect threads, roundness, concentricity,
and tooth profiles. Titanium Nitride coating increases lubricity and
durability. Ridden by the most dominant track team in the world. With
wins in the recent World Championships and Beijing Olympics, this cog
is appropriately named.

• 13t through 18t - 1/8" only.
• Hand filed, hand polished
• Quietest, smoothest running cog ever designed.
• Designed around the Izumi Super V chain & Sugino Gigas Chainring (although not required)