Shimano Dura-Ace 10-Speed Cassette

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10-speed sprockets provide a wider gear choice. Light alloy sprocket carrier reduces cassette weight while increasing sprocket stiffness and improving shifting power. Mix of titanium and cromoly sprockets offers the best balance of strength and weight. This 10-Speed cassette with Dura-Ace technology assures maximum torque response. Use with Dura-Ace super narrow chain for 10-speed.