Shimano - CS-R8000 Ultegra 11 Speed 11-30T Bikes Contains UV dye so that

Contains UV dye so that you can check to ensure maximum coverage

Synthetic resin pads offer reduced noise when braking in both dry and wet conditions

pedal refresh kit

this 303 wheelset maintains its ideal-for-every-terrain 45mm rim depth but adds a significantly wider internal width to provide greater performance and ride quality in almost every measurable way

Shimano - CS-R8000 Ultegra 11 Speed 11-30T Bikes Contains UV dye so thatSHIMANO 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.