Warning: EPS Groupsets will not work 11 gear ratio with cassettes. Please use 12 gear ratio & above instead. In competition every little detail counts; that's why steel & titanium were used when producing Record sprockets. The perfect teeth design results in a perfect synchronization between shifting & chain movement. The six larger sprockets are divided in triplets, which are mounted on special frames to increase rigidity. Technical Specifications:8 steel sprockets 3 titanium sprocketsnickel-chromed finish for steel sprocketslight alloy carrierlight alloy supports for the final two triplets 11x timing 11x tooth machining 11x light alloy lockring Thread 27 x 1 Weight 201g