SwissStop Catalyst disc rotors deliver consistent brake torque over long durations where others experience gradual decline and brake fade. Due to extremely efficient thermal management, Catalyst provides notably shorter stopping distances with very low wear rates under hard braking, exceeding the current industry leaders. Tested and proven Catalyst brake ring with one-piece construction can be used with adapter for Centerlock hubs Weight 156g / Thickness 1.95mm / 6 Bolt Mount