The Shimano Ultegra R8000 11-Speed Road Cassette 12-25 Ratio is built for performance, particularly in combination with other components from the Ultegra series. The high-performance gear combinations provide superior rider choice helping to turn you into a precision instrument when on the saddle. The combined use of carbon, aluminium and steel in this cassette provides an amazing balance between efficient power delivery and weight saving. This is truly a must-have when building or kitting out a professional level racing bike. Key Features: - 11-Speed- HG-EV 11-speed, HG-X 11-speed Chain Compatible- Carbon/Aluminium Spider Arm- Steel Sprockets- Aluminium Lock Ring

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