The ultimate racing cassette for the most weight-conscious this Super Record™ sprocket set exploits a new frame for the two supersize titanium sprocket triplets. The strength and resistance to torsion have been increased as a result. The design of the teeth strains the chain less. Five separate nickel-chrome steel and 6 titanium cogs on 2 light alloy carriers for incredible weight and stiffness. 11 speed cassettes have different tooth profiles and shift timing for increased performance. 11 speed specific light alloy lockring is included. Use only with Campagnolo 11 speed chains. 150 grams (11-23).