Shimano ULTEGRA CS-R8000 11-Speed Cassette Size:- 11-25 Tooth This single-speed trailer cycle helps

This single-speed trailer cycle helps kids learn balance while offering superior handling

Great for most hybrids with a 6/7/8 speed freewheel

Packaging should be the same as what is found in a retail store

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Shimano ULTEGRA CS-R8000 11-Speed Cassette Size:- 11-25 Tooth This single-speed trailer cycle helpsSHIMANO ULTEGRA 11 Speed HG EV Road Cassette Sprocket System engineered for use with the SHIMANO ULTEGRA R8000 groupset, the R8000 cassette is available in a wide range of road and mixed surface ratios. It is compatible with HG EV and HG X11 chains. High performance gear combinations provide superior rider choice