COMPOUNDS:Disc RSRACE READY | SILENT POWER - Quiet, powerful braking. Our organic compound delivers smooth modulation that is quiet in wet and dry conditions. The 1.6mm thin backplate saves weight, yet provides preffered thermal characteristicsDisc EHIGH ENDURANCE | EASY MODULATION - Long lasting, high endurance organic pad compound. The high temperature stability provides consistent power and easy modulation of braking force