132 grams for 12-21 range.

CNC Machined cogs, made of ergal 7075 heat treated light alloy, submitted to a special thinkness anodizing that produces a very hard surface necessary for high resistence to wear. The 1st position cog is made of special heat treating and chrome plating. 11t-28t available. Shimano or Campagnolo. 9 & 10 speed.

Alloy lockring.