Details – Optimized 11-speed tooth design for shifting speed and fluidity. Evolved sprocket timing reduces stress on the chain and allows for easier shifting through the higher cogs- Top six cogs are divided into sets of three and are mounted on aluminum carriers. This increases rigidity by 180% and the individual cogs are 70% more resistant to torsion- Cogs are steel with a nickel-chrome treatment- Only compatible with 2015 mechanical drivetrains and no EPS, due to chain wrap capacityCassette Body Type: Campagnolo 10/11-speedCassette Cogs: 11-12-13-14-15-17-19-21-23-26-29Cassette Spacing: Campagnolo 11-speedRange: 11-29Weight: 230g