Shimano Ultegra CS-R8000 11-28T (11speed) Cassette11-12-13-14-15-17-19-21-23-25-28Weight: 251 gr. Shimano Ultegra CS-R8000 11-28T (11speed) CassetteCompatible with HG-EV 11-speed and HG-X 11-speed chainsThe most versatile tooth option. The wide variety of developments is consistent with the concept that Shimano has defined as "Rider tuned drivetrain" or transmission adjusted to each rider and offers ratios that are considered suitable for all styles of cycling.11-12-13-14-15-17-19-21-23-25-28Weight: 251 gr.