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Shimano K03S brake pads feature a resin pad compound and steel backplate. Resin pads offer better modulation and less noise. Includes springs. Compatible series: Xtr M9100 Series, Deore XT M8100 Series, Dura-Ace R9150 Series, Ultegra R8050 Series, Shimano 105 R7000 Series, Tiagra 4700 Series, GRX 11-speed, GRX 10-speed.